Group Title: Bulletin - University of Florida. Agricultural Experiment Station ; 168
Title: Synopsis and catalog of the Thysanoptera of North America
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 Material Information
Title: Synopsis and catalog of the Thysanoptera of North America with a translation of Karny's Keys to the genera of Thysanoptera and a bibliography of recent publications
Series Title: Bulletin University of Florida. Agricultural Experiment Station
Physical Description: 100 p. : ; 23 cm.
Language: English
Creator: Watson, J. R ( Joseph Ralph ), 1874-1946
Karny, H. H ( Heinrich Hugo ), 1886-1939
Publisher: University of Florida Agricultural Experiment Station
Place of Publication: Gainesville Fla
Publication Date: 1923
Subject: Thrips -- Classification   ( lcsh )
Thrips -- North America   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
bibliography   ( marcgt )
non-fiction   ( marcgt )
Bibliography: Bibliography: p. 83-88.
Statement of Responsibility: by J.R. Watson.
General Note: Cover title.
General Note: Includes indexes.
 Record Information
Bibliographic ID: UF00026400
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: aleph - 000922817
oclc - 13503243
notis - AEN3326
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Full Text


The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source

site maintained by the Florida
Cooperative Extension Service.

Copyright 2005, Board of Trustees, University
of Florida

December, 1923

Agricultural Experiment Station




With a Translation of Karny's Keys to the Genera of Thy-
sanoptera and a Bibliography of Recent Publications



Bulletins will be sent free upon application to the Experiment Station,

Bulletin 168


P. K. YONGE, Chairman, Pensacola
W. L. WEAVER, Perry
J. C. COOPER, JR., Jacksonville
A. H. BLENDING, Leesburg
J. T. DIAMOND, Secretary, Tallahassee
J. G. KELLUM, Auditor, Tallahassee

WILMON NEWELL, D. Sc., Director
JOHN M. SCOTT, B. S., Vice Director and Animal Industrialist
J. R. WATSON, A. M., Entomologist
R. W. RUPRECHT, Ph. D., Chemist
0. F. BURGER, D. Sc., Plant Pathologist
W. E. STOKES, M. S., Grass and Forage Crops Specialist
G. F. WEBER, Ph. D., Associate Plant Pathologist
'A. S. RHOADS, Ph. D., Assistant Plant Pathologist
G. H. BLACKMON, B. S. A., Pecan Culturist
ED L. AYERS, B. S., Agriculturist
A. H. BEYER, M. S., Assistant Entomologist
C. E. BELL, B. S., Assistant Chemist
J. M. COLEMAN, B. S., Assistant Chemist
HAROLD MOWRY, Assistant Horticulturist
ROBERT E. NOLEN, B. S. A., Lab. Asst. in Plant Pathology
MARY E. Roux, Mailing Clerk
A. W. LELAND, Farm Foreman
K. H. GRAHAM, Auditor
RETTA MCQUARRIE, Assistant to Auditor
W. B. TISDALE, Ph. D., Associate Plant Pathologist, Tobacco Ex-
periment Station (Quincy)
JESSE REEVES, Foreman, Tobacco Experiment Station (Quincy)
J. G. KELLY, B. S. A., Lab. Asst. in Plant Pathology
J. H. JEFFERIES, Superintendent Citrus Experiment Station
(Lake Alfred)
L. O. GRATZ, Ph. D., Assistant Plant Pathologist (Hastings)
GEO. E. TEDDER, Foreman, Everglades Experiment Station (Belle

/ .. .





In 1902 Dr. W. L. Hinds published his classical "Monograph of
the Thysanoptera of North America." In 1911 Moulton pub-
lished his valuable "Synopsis, Catalogue, and Bibliography of
North American Thysanoptera."
These two works have been the chief guides to the workers in
this group for the last decade and longer. But Moulton's work is
now out of date. To what extent it is out of date may be judged
from the fact that whereas it contains but 40 genera and 118
species, the present work enumerates 86 genera and over 300
species. The descriptions of the new species and the changes in
nomenclature resulting from the work of Hood, Morgan, Bagnall,
Treherne and others are widely scattered thru many publications.
To index this scattered literature and bring the keys up to date
is the object of this paper.
In 1922 Dr. H. Karny of Java did a great service to all thy-
sanopterists by the publication of his key to the genera and
higher groups of the order. The key to the genera in the present
publication, for the most part, is only a translation of Karny's
work, with minor changes, and the addition of a few genera
described since Karny's article was written. These additions
are the author's, not Karny's. In this key those genera not at
present known to occur in North America are printed in smaller
type. Families not represented at all in North America have
been omitted. In the work of translating this key the author
has had the cooperation of E. W. Berger, entomologist of the
State Plant Board of Florida. The translations have been com-
pared with one by R. C. Treherne of the Division of Entomology
of the Canadian Department of Agriculture. The rendition of
Professor Treherne was adopted in numerous instances.
In the preparation of this work the author has enjoyed the
most painstaking and hearty cooperation of Professor Treherne

Florida Agricultural Experiment Station

and Dr. Karny. Without their generous cooperation the work
would have been still more incomplete than it doubtless is. They
both have added many species to the list, and aided greatly with
the bibliography and synonymy.
The work was intended to cover all of North America from
the southern boundary of Mexico north, including the West
Indies. There have also been included many species at present
known only from Panama, as it seems likely that they may be
found in the West Indies, or even southern Florida, or are liable
to be carried there.
In the bibliography no attempt has been made to list all the
older works, especially those listed in Hind's Monograph, as that
work is still available and indispensable to a thysanopterist.
The author's genus Karnyothrips was originally described as
Karnyia, but Dr. Karny calls the author's attention to the fact
that the name is preoccupied by a genus of orthoptera. For the
same reason Karny has changed the author's genus Dolicothrips
to Watsoniella.
The figures following an author's name refer to the corre-
sponding dates in the bibliography. No attempt has been made
to refer to all the literature recording the host plants and locali-
ties of capture. For such references the reader is referred to
the works of the various authors, especially Morgan, '13, and
Treherne for British Columbia. Localities and host plants here
listed for the first time are placed at the end, and are separated
from the others by a semicolon and a dash (;-).
Since the receipt of Karny's key the writer has gone over all
the species in his collection and brought the nomenclature into
harmony with this work. This has necessitated shifting several
species, including some of those described by the author to differ-
ent genera.
The genus Idolothrips is (according to Karny) now restricted
to Australian species. The generic position of many American
species formerly included in this genus is doubtful. They have
been referred to the most likely genus. Ultimately new genera
will probably have to be erected for some of them.
Dr. Karny first called the writer's attention to the probability
of Dictyothrips reticulatus Crawford as being a Ctenothrips. An
examination of the figures accompanying Crawford's description
leaves no doubt of its being a Ctenothrips instead of a Dictyo-
thrips (misspelled Dictothrips in Moulton, '11.) The reticulations
are confluent, transverse ridges, rather than the characteristic

Bulletin 168, Thysanoptera of North America 5

polygonal areas of the Heliothripinae. The posterior angles of
the prothorax, moreover, bear heavy bristles. Dictyothrips flori-
densis is also probably a Ctenothrips. The pronotum is covered
with polygonal areas in every way similar to those of the Helio-
thripinae, but those on the head and abdomen and most of those
on the pterothorax, are of the Ctenothrips type. This species
is thus interesting as showing an approach to the Heliothripinae.
Dictyothrips will thus have to be dropped from the list of North
American genera.
A number of new genera, species, and varieties are described
herein. These descriptions will be found near the end of the

Florida Agricultural Experiment Station


(After Karny, '21)

1. Female with a saw-like ovipositor formed out of two pairs of gonapo-
physes arising from the 8th and 9th abdominal segments. The last
abdominal segment rarely tubular in the female, often divided length-
wise along the ventral surface and usually conical, and in the male,
usually bluntly rounded, never tubular. Wings having microscopic
hairs; the fore wings with a marginal vein, and at least one longitu-
dinal vein reaching to the very front of the wing.
2. Ovipositor up-turned, wings broad and rounded at the ends, body
not depressed, antennae 9-segmented.
Only one family of wide distribution; in addition to recent ones
there are three fossil genera with six species.
22. Ovipositor turned down, wings narrower, usually pointed at the
end. Body more or less depressed. Antennae 6- to 8-segmented
(exceptionally 9-segmented) .........Superfamily THRIPOIDEA Hood.
3. Antennae clearly 9- or 10-segmented, without an end style; 3d
and 4th segments enlarged, conical, without sense cones but
with sensory band at end. Fore tarsus with a claw-like appen-
dage at the base of the 2d segment.
33. Antennae 6- to 8-segmented, the 6th segment rarely with a
partition so that the antennae appear to be 9-segmented;
usually with a 1- or 2-segmented end-style; 3d and 4th seg-
ments not conical, usually with sense cones, rarely with sen-
sory band at end. Fore tarsus never with an appendage at the
base of the 2d segment.
4. Antennae not thread-like, 6- to 8-segmented, always with an
end style of one or two segments; 3d segment generally
and 4th always with sense cones, never with a tympanum-
like area at the end of the dorsal surface, pronotum with-
out longitudinal dorsal sutures; fore and hind femora not
broadened; end of abdomen usually sharply conical; ovi-
positor usually well developed.
5. Antennal segment 6 large; never small in comparison
with 5, usually the largest in the whole antenna.
6. Last abdominal segment of the female conical, not
strongly chitinized, seldom more so than the pre-
ceding segments. Bristles on the 9th and 10th seg-
ments not usually long and strong, never thorn-
like..............................------THRIPIDAE Uzel. P. 9
66. Last abdominal segment of the female cylindrical,
very strongly chitinized. Bristles on the 9th and
10th segments unusually long and strong, thorn-
like ...........PANCHAETOTHRIPIDAE Bagnall. P. 15

Bulletin 168, Thysanoptera of North America

55. The 6th, or 6th and 7th antenna segments small, style-like, small
in comparison with the 5th which is the largest in the whole
antenna .... ........ ............................. CERATOTHRIPIDAE Bagnall.
44. Antennae thread-like, 8-segmented, without end-style.
Third and 4th segments without sense cones, but each one
with a tympanum-like area at end on dorsal surface. Pro-
notum with longitudinal dorsal sutures. Fore and hind fe-
mora markedly thickened, abdomen blunt, ovipostor very
weak, apparently functionless.
11. Female without an ovipositor. The last abdominal segment in both
sexes closed below, usually tubular. Wings without bristles, the fore
wings with only one, usually simple, shortened, central vein.
Suborder TUBULLIFERA Haliday.
2. Maxillary palpus 2-segmented, antennae 8 rarely 7-segmented.
Middle coxae further apart than the fore and hind coxae. Ninth
abdominal segment never or rarely longer than the 8th. Terminal
bristles of the abdomen seldom much longer than the tube.
3. Last abdominal segment not at all tubular, greatly swollen.
Seen from above parabolic in outline; dorsal plates of abdomi-
nal segments 2 to 9 transversely linear; in the only known
genus the breadth is five times the length in the middle.
33. Last abdominal segment slender, cylindrical, or tubular, com-
prising the tube. Dorsal plates of abdominal segments 2 to
9 not transversely linear.
4. The 8th abdominal segment without peg-like projections
on the posterior margin.
5. Tube much shorter than the remaining abdominal seg-
ments taken together.
6. Third antennal segment with a ring of very powerful sen-
sory rods on the distal part.
66. Sensory rods on the 3d antennal segment no more
strongly developed than on the other segments.
7. Sensory cones of the antennae extraordinarily
long and sharp, and beside each of them an ad-
ditional accessory cone or a long slender bristle.
The anterior segment bearing these organs
much swollen. Eyes unusually large, touching
each other. Mouth cone very sharply pointed.
77. Sensory cones of the antennae not unusually
developed. Eyes smaller.
8. Sixth abdominal segment, in the male
also, without horn-shaped appendages.
9. Anterior ocellus equidistant. Head
not projecting over the eyes; ver-
tex not sharply conical, rarely ex-

Florida Agricultural Experiment Station

tending forward over base of an-
99. Anterior ocellus further distant
from both posterior ocelli than
these are from one another. Head
produced more or less in front of
the eyes. Vertex conical, usually
projecting forward over the bases of
antennae, bearing the anterior ocel-
lus at the peak and usually with a
strong bristle by the eyes.
88. Sixth abdominal segment, at least in
the male, with a powerful horn-like ap-
pendage on each side.
55. Tube much lengthened, three or four times as long as the head,
and about as long as all the rest of the abdominal segments taken
together -.........................................H..... ISTRICOTHRIPIDAE Karny.
44. Eighth abdominal segment on the posterior margin with
long rod-shaped processes extending posteriorly. Anten-
nae and tube unusually short and thick.
22. Maxillary palpus 1-segmented. Antennae 4 to 7-segmented. Hind coxae further
distant from one another than the fore and middle ones; 9th abdominal segment
longer than the 8th; terminal bristles of the abdomen markedly longer than the
Superfamily UROTHRIPOIDEA Hood.



1. Nearly all the antennal segments freely movable; labial palpi with
fewer segments than the maxillary palpi.
2. Maxillary palpi with from 7 to 8, and labial palpi with from 3 to
5 segments........................................................OROTHRIPINAE. P. 8
22. Maxillary and labial palpi with 2 to 3 segments.
11. From three to five terminal antennal segments firmly united; maxillary
palpi 3-segmented; labial palpi 4-segmented..AEOLOTHRIPINAE P. 9
1. Fore wings broadened toward the tip.
2. Eight or nine antenna segments free (fossil) ..............LITHADOTHRIPS Scudder.
22. The three terminal antennal segments more or less firmly united.
11. Wings not broadened toward the tip.
2. Fore wings with a dark longitudinal band along the posterior
margin ............................... .........2. ERYTHROTHRIPS Moulton.

Bulletin 168, Thysanoptera of North America

22. Fore wings with dark transverse bands.
3. Labial palpi 4- or 5-segmented. All antennal segments more
or less distinctly separated............3. OROTHRIPS Moulton.
33. Labial palpi 3-segmented. Fifth to 9th antenna segments clearly united,
seemingly forming one segment............ ... ...........DESMOTHRIPS Hood.

1. All antennal segments simple.......................................................MELANTHRIPS Haliday.
11. First or 2nd antennal segments lengthened into a tooth-like process.
2. First antennal segment lengthened into a tooth-like process.
22. Second antennal segment so lengthened.
4. ANKOTHRIPS Crawford.

1. Only the three terminal segments united.
2. Antennae 9 segmented .......................... .... .............RHIPIDOTHRIPS Uzel.
22. Antennae 7 segmented (?) (fossil)....................................PALAETHRIPS Scudder.
11. The terminal 4 to 5 segments united.
2. Fore wings with cross veins..........-...5. AEOLOTHRIPS Haliday.
22. Fore wings without cross veins.
3. Antennae not unusually long-..6.. FRANKLINOTHRIPS Back.
33. Antennae more than six times as long as the head, noticeably
thin ..................... .....................7. MITOTHRIPS Trybom.

1. Last abdominal segment normally developed.
11. Last abdominal segment cylindrical, noticeably long and thin.
Key to Subfamilies
1. Head produced in front of eyes into a triangular process, upon which
the antennae are inserted. Males (so far as known) without wings,
females with wings.
2. Fore wings with only one longitudinal vein. Sixth antennal seg-
ment with an oblique cross partition so that the antennae appear
to be 9-segmented........-.............. ......CORYNOTHRIPINAE. P. 10
22. Fore wings with two longitudinal veins, antennae clearly 8-seg-
mented. Sixth segment without partition.
11. Head without three-pointed process in front of eyes, males and fe-
males usually alike.
2. Surface of body with distinct polygonal areas (cf. also CTENO-
THRIPS)................................................. HELIOTHRIPINAE. P. 11
22. Surface of body without such areas, at the very most with only
partly confluent transverse wrinkles.
3. Body noticeably broad and compact; if not, the fore wings
have only one longitudinal vein.... -..SERICOTHRIPINAE. P. 10
33. Body not particularly broad and compact, fore wings when
present with two or more longitudinal veins.

Florida Agricultural Experiment Station

4. Style clearly shorter than the 6th segment or 1-segmented.
End of abdomen not much narrowed, never tubular.
5. Mouth cone not noticeably narrow and long, not ex-
tending to the mesosternum.
6. Posterior angles of the prothorax always with one
or two strong bristles .....-........-THRIPINAE. P. 11
66. Posterior angles of the prothorax without espe-
cially strong bristles......APTINOTHRIPINAE. P. 14
55. Mouth cone particularly long and narrow extending to
the mesosternum..............MYCTEROTHRIPINAE. P. 13
44. Style 2-segmented, longer than the 6th antennal segment,
or the end of abdomen markedly narrow, often tubular.
Key to the Genera
A single genus.....................---.....-.........9. CORYNOTHRIPS Williams.
1. Head very small, noticeably smaller than the prothorax.
10. CHIROTHRIPS Haliday.
11. Head large, longer than broad, broadening posteriorly.
11. LIMOTHRIPS Haliday.
1. Maxillary palpus 3-segmented.
2. Posterior angles of prothorax without strong bristles.
3. Cheeks without a row of short spines. Wings fully developed
or reduced.
4. Prothorax thruout the whole length of anterior and lateral margin, with
net-like sculpture........................................................ HYDATOTHRIPS Karny.
44. Without sculpturing..............12. SERICOTHRIPS Haliday.
33. Cheeks with a row of sharp thorn-like teeth on each side be-
hind the eyes. Wings entirely absent.
22. Posterior angles of prothorax with a strong bristle on each side.
3. Wings fully developed..................-...14. SCIRTOTHRIPS Shull.
4. Antennae seemingly 9-segmented.
44. Antennae clearly 8-segmented........ SCIRTOTHRIPS s. str.
33. Wings reduced. Antennae always clearly 8-segmented.
11. Maxillary palpus 2-segmented.
2. Antennae 7-segmented. Posterior angles of prothorax on each side with two bris-
tles. W ings absent .................. ................................ ...................PLATYTHRIPS Uzel.
22. Antennae 8-segmented. Wings fully developed.
4. Fore wings gradually tapering and evenly rounded at the ends.
44. Fore wings very much widened in front quarter, the anterior margin
bending round at the end into the straight posterior margin.
5. Posterior angles of prothorax without bristles.
55. Posterior angles of prothorax with bristles.
6. Posterior angles of prothorax on each side with one bristle.

Bulletin 168, Thysanoptera of North America 11

66. Posterior angles of prothorax on each side with two bris-
tles ..............................................................D..- ICHAETELLA Priesner.
1. The first two antennal segments normal, more or less rounded.
2. Wings fully developed.
3. Style present.
4. Style 2-segmented.
5. Prothorax with flat wing-like lateral margins.
6. Style not longer than the 6th antennal segment, its second
segment less than twice as long as the first.
PTEROTHRIPS Hood ('18, p. 123).
66. Second segment of the style long, bristle-like.
55. Side of prothorax without extensions.
6. Anterior part of the head between the antennae noticeably
broadly rounded. Dorsal surface densely wrinkled but with-
out definite polygonal areas. Fore wings with very small
hairs on the veins ......._...............RHIPIPHOROTHRIPS Morgan.
66. Anterior margin of head narrower, dorsal surface
of head with distinct net-like sculpture.
7. Fore wings covered with strong, long bristles,
thickened at end.
77. Bristles of the fore wings without knob-like
8. Second segment of the style about as long as the
first ............................................DICTYOTHRIPS Uzel.
88. Second segment of the style much longer
than the first-.16. HELIOTHRIPS Haliday.
44. Style 1-segmented.-........-....17. PARTHENOTHRIPS Uzel.
33. Style absent.................. .. .. ............................ASTROTHRIPS Karny
22. Wings absent.....................................18. PROSOPOTHRIPS Uzel.
11. Last four antennal segments cylindrical, forming a sharply cone-shaped whole.
111. Last three antennal segments (5-7) compactly united into a fustiform mass.
PHIBALOTHRIPS Hood ('18, p. 125).
1. Surface of body with numerous confluent transverse ridges, forming a
sort of net-like sculpture.
2. Hind margin of the 8th abdominal segment cone-like.
19. CTENOTHRIPS Franklin.
22. Hind margin of the 8th abdominal segment not cone-like.
11. Without any sign of net-like sculpture.
2. Body not unusually narrow.
3. Antennae 7- or 8-segmented.
4. Fore tibia unarmed.
5. Anterior angles of prothorax on each side with a long
strong bristle.
6. Prothorax with a rather long bristle in the middle of
each lateral margin.......21. SCOLOTHRIPS Hinds.
66. Sides of prothorax without bristles.

Florida Agricultural Experiment Station

7. Eighth abdominal segments without projections.
8. Anterior angles of prothorax on each side with two
long bristles of which the outer is only about half
as long as the inner.
88. Anterior angles of prothorax on each side
with one or two 'bristles; in the latter case the
outer considerably longer than the inner.
77. Eighth abdominal segment in the male, on each side, with
short lateral projections that are bent upward and back-
ward; in the female reduced but recognizable.
55. Anterior angles of prothorax without a strong bristle.
6. Maxillary palpus 3-segmented.
7. Antennae 8- or apparently 9-segmented.
8. Posterior angles of prothorax with only one
strong bristle on each side.
9. Head little broader than long. Fore wings
not regularly set with bristles.
cf. 14. SCIRTOTHRIPS Shull.
99. Head one and a half times as broad as
long; fore wings with a continuous row
of bristles.....23. PSEUDOTHRIPS Hinds.
10. Antennae apparently 9-segmented.
1010. Antennae clearly 8-segmented.
88. Antennae clearly 8-segmented. Posterior
angles of prothorax with two strong bristles
on each side.
9. The bases of the 4th and 5th antennal segments
set off from the main body of the segments and
forming a small distinct ring.
99. The bases of the 4th and 5th antennal
segments not set off.
24. TAENIOTHRIPS Serville.
10. Wings at least in the female, fully
11. Wings fully developed in both
12. Fore wings with trans-
verse bands.
1212. Fore wings without trans-
verse bands.............subgen.
1111. Wings in male reduced, in female
fully developed. End of abdomen
pointed in female.
Subgen. AMBLYTHRIPS Bagnall.

Bulletin 168, Thysanoptera of North America

1010. Wings in both sexes (usually) reduced.
Subgen. PEZOTHRIPS Karny.
77. Antennae 7-segmented.
8. Head extended anteriorly into a triangular
process. Ovipositor reduced.
88. Head without triangular prolongation, ovi-
positor well developed.
9. Both longitudinal veins of the fore wings even-
ly set with bristles along their entire length.
99. The longitudinal veins of fore wings not
regularly set with bristles.
10. Prothorax with a strong bristle in the middle
of each lateral margin.
1010. Prothorax set with fairly strong
bristles at posterior angles only.
11. Two long strong bristles of ap-
proximately equal length on each
each posterior angle.
26. THRIPS Linnaeus.
1111. The outer of the two bristles on the
posterior angles of the prothorax not
even half as long as the inner, stiff and
very strong, the end of abdomen beset
with bristles.
66. Maxillary palpus 2-segmented.
7. Antennae 8-segmented............DIARTHROTHRIPS Williams.
77. Antennae 7-segmented.
8. The two longitudinal veins of the fore wings
clearly separated. 27. BALIOTHRIPS Uzel.
88. The two longitudinal veins of the fore wings
united from the base to the end.
28. MICROTHRIPS. Morgan.
44. Fore tibiae armed at the end with one or two teeth.
5. Antennae 8-segmented. 29. ODONTOTHRIPS Servile.
55. Antennae 7-segmented..........................................SIMYOTHRIPS Uzel.
33. Antennae 6-segmented ......................... .............. .. DREPANOTHRIPS Uzel.
22. Body unusually narrow.
3. Wings absent. Maxillary palpus 3-segmented..................BOLACOTHRIPS Uzel.
33. Wings and ocelli present.
4. Maxillary palpus 2-segmented.................................. STENOTHRIPS Uzel.
44. Maxillary palpus 3-segmented..........................MECOTHRIPS Karny ('21b).
1. Antennae (as far as known) 9-segmented.
2. Posterior angles of the prothorax with only short thin bristles.
22. Posterior angles of the prothorax with two long bristles. Both longitudinal veins
of the fore wings uniformly set with bristles......................HOMOTHRIPS Bagnall.
11. Antennae 8-segmented. Posterior angles of the prothorax with two
strong bristles.................................30. MYCTEROTHRIPS Trybom.

14 Florida Agricultural Experiment Station

1. Ocelli large and distinct.
2. Fore wings with two longitudinal veins (sometimes indistinct) which
carry several bristles.
3. Head one and a half times as broad as long. Both veins of the fore wings
with a uniformly spaced row of bristles .......PSEUDANAPHOTHRIPS Karny.
33. Head little or no broader than long. Veins of the fore wings
not regularly beset with bristles.....31. ANAPHOTHRIPS Uzel.
4. Antennae apparently 9-segmented.
Subgenus ANAPHOTHRIPS s. str.
44. Antennae plainly 8-segmented......Subgenus NEOPHYSOPUS Schmutz.
22. Fore wings without longitudinal veins and surface of wings without bristles.
11. Wings and ocelli atrophied or entirely absent.
2. Head broader than long. Bristles on the end of the abdomen relatively long
and sturdy ................................................ ............................... AGEROTHRIPS Trybom.
22. Head longer than broad. End of abdomen with only short and very
thin bristles................. ..............32. APTINOTHRIPS Haliday

1. Style plainly shorter than the 6th antennal segment.
2. Posterior angles of the prothorax with one bristle.
3. Mouth cone moderate; head longer; antennae not inserted
below the vertex-........... ....................33. OXYTHRIPS Uzel.
33. Mouth cone extending far into mesosternum; head nearly
twice as wide as long.
4. Antennae inserted below the vertex.
44. Antennae not inserted below the vertex........PERISSOTHRIPS Hood ('19).
22. Posterior angles of the prothorax with two bristles.
3. Head plainly broader than long.
4. Wings reduced, or the anetrior vein of the fore wings not united with the
costal vein by a cross AMBLYTHRIPS Bagnall.
44. Wings fully developed, the anterior vein united with the costal by a
cross vein.............................. ...... ............SYNAPTOTHRIPS Trybom.
33. Head about as long as wide, widest across the eyes, eyes pro-
truding.........................................35. BREGMATOTHRIPS Hood.
11. Style about as long or longer than the 6th antennal segment.
2. Fore wings clear, with two longitudinal veins, or reduced.
3. Style somewhat shorter than the 6th antennal segment. The last two
abdominal segments markedly narrowed.
4. Bristles present on the posterior angles of the prothorax (?). Last
abdominal segment conically pointed, and with the preceding segment
longer than head and prothorax together.
44. Prothorax without long hairs. The last abdominal segment a long thin
tube ............................................. ...............................BELOTHRIPS Haliday.
33. Style much longer than the 6th antennal segment. End of
abdomen not noticeably narrowed. Posterior angles of the
prothorax with two long bristles.
22. Fore wings fully developed, black, with only one longitudinal vein.

Bulletin 168, Thysanoptera of North America

1. Surface of the body plainly sculptured with a polygonal net-work.
11. Surface of the body without net-like sculpturing.
2. Head widest across the eyes. Fourth antennal segment about twice as long as
the 6th............................................................................PANCHAETOTHRIPS Bagnall.
22. Head widened posteriorly, sixth antennal segment the longest of all.
1. A single genus.................. --...-... ..........38. MEROTHRIPS Hood
1. Single genus................... ............................................................................ PYGOTHRIPS Hood.
1. Cheeks with thorn-bearing warts. Fore femur armed with a tooth;
third antennal segment little or no longer than fourth.
11. Cheeks without warts. Fore femur unarmed; third antennal segment
much longer than fourth......................--..40. SEDULOTHRIPS Bagnall
Key to the Subfamilies
1. Cheeks covered with bristle-bearing warts.
11. Cheeks without bristle-bearing warts.
2. Cheeks not covered throughout their entire length with thorn-like
3. Head not greatly swollen toward the posterior.
4. Mouth cone sharply pointed at end (cf. also NEO-
HEEGERIA) ....................................LIOTHRIPINAE. P. 16
44. Mouth cone rounded at end.
5. Wings narrowed in the middle, like a lengthened
sole; when missing, the prothorax along the pos-
terior margin is not much broader than the head.
55. Wings reduced or not or very little narrowed in the
middle. Prothorax posteriorly plainly broader than
the head. .......................(cf. also HAPLOTHRIPS. I)
6. Head little or not at all longer than the pro-
7. Fore tibia unarmed.
77. Fore tibia with a tooth at the end on the inside.
66. Head distinctly longer than the prothorax.
7. Head seldom more than twice as long as
broad, its sides quite uniform. Antennae
not unusually long and thin and without
teeth-like projections on the segments.
77. Head more than twice as long as broad usually con-
stricted between the eyes and in front of the

Florida Agricultural Experiment Station

posterior margin; the sides between the two con-
strictions convex. Antennae unusually long and
thin, or several terminal segments with a tooth-
like projection on the dorsal side.
33. Head in dorsal view narrowed posteriorly, in lateral view much swollen in
dorsal aspect ........ ............................................DOC SSISSOPHOTHRIPINAE.
22. Cheeks equally set thruout their length with numerous short, thorn-like bris-
tles ........................................................... .... .......................... MACROTHRIPINAE.

1. Compound eyes moderately large, not covering the whole of the fore
part of the head.
2. Fore femora in both sexes unarmed (cf. also Haplothrips B, II, a.).
3. Eighth abdominal segment (perhaps only in the male) with a tooth-like
process on the sides.................................................ODONTINOTHRIPS Priesner.
33. Eighth abdominal segment simple.
4. Body not reticulate.
5. Wings present............ 41. PHLOEOTHRIPS Haliday.
55. Wings reduced .........-- .......42. MALACOTHRIPS Hinds.
44. Whole surface of the body reticulate....................INIOTHRIPS John ('22).
22. Fore femur toothed, at least in the male.
3. Fore femora in the male with two teeth on inner side, in the
female usually unarmed............43. HOPLANDROTHRIPS Hood.
33. Fore femora in both sexes armed on inner margin with one tooth.
11. Compound eyes very large, covering nearly the whole front part of the head, leaving
only a small area for the ocelli........................... ................ cf. EUPATHITHRIPS Bagnall.
1. Fore wings not narrowed in the middle.
2. Antennae 8-segmented.
3. Head barely or no longer than the prothorax.
4. Seventh and 8th antennal segments clearly distinct.
5. Fore femora of female not swollen..EURHYNCHOTHRIPS Bagnall.
55. Fore femora of female swollen.
6. Tarsal tooth large........................ARRHENOTHRIPS Hood ('19).
66. Tarsal tooth lacking.
44. Seventh and 8th antennal segments apparently united.
5. Head barely or no longer than broad.
55. Head clearly longer than broad................. HORISTOTHRIPS Morgan.
33. Head clearly longer than the prothorax.
4. Wings fully developed.
5. Tube generally clearly more than half as long as the
6. Antennae and legs short and thick.
66. Antennae and legs slender. 48. LIOTHRIPS Uzel.
55. Tube only about half as long as the head. Very strong anteocular
bristles anteriorly directed.....................................TRYBOMIA Karny.
44. Wings much reduced or absent.
5. Third antennal segment pronouncedly longer than the others.

Bulletin 168, Thysanoptera of North America

55. Third antennal segment scarcely or no longer than the
6. Third antennal segment noticeably short, shorter
than the 8th.-.....................49. LISSOTHRIPS Hood.
66. Third antennal segment clearly longer than the 8th.
7. The whole thorax adorned with a snow-white band, on
each side, continued into the first abdominal segments.
77. Unicolored, the thorax without white bands. The
7th and 8th antennal segments broadly joined,
apparently united...........50. NEOTHRIPS Hood.
22. Antennae 69. SYMPHYOTHRIPS H & W.
11. Wings always well developed, narrowed in the middle, like an elongated
2. Head long and narrow, gradually tapering posteriorly, twice as long as broad.
22. Head at the most a third longer than broad, with slightly convex 58. NEOHEEGERIA Schmutz.
1. Bristles of the prothorax simple, with pointed (or slightly dilated)
tips, never funnel-shaped.
2. Fore femora unarmed.
3. Fore tibia unarmed
4. Third antennal segment noticeably short, shorter than the 49. LISSOTHRIPS Hood.
44. Third antennal segment pronouncedly longer than the 8th.
5. Posterior part of prothorax not much broader than the
6. Mouth cone reaching almost to the mesosternum.
66. Mouth cone short, reaching to mdidle of prosternum.
7. Head rounded in front; abdomen short, uniformly
8. Thorax normal.
9. Head considerably longer than broad;
sides of prothorax diverging but slightly.
99. Head about as long as broad; sides of
prothorax strongly diverging posteriorly.
88. Thorax very small and narrow.
77. Head square in front; abdomen long and slender,
anterior segments yellow.
55. Posterior part of prothorax clearly broader than the
6. Head normal.
7. Head and body extremity dark, middle of body
light yellowish.

Florida Agricultural Experiment Station

8. Bristles on tube and 9th abdominal segment
noticeably long (rarely about half as long
as the tube). The remaining abdominal bris-
tles club-like; head but little longer than
broad.--....................56. HINDSIANA Karny.
88. Bristles not as above; head much longer than
broad........................f. 55. WATSONIELLA.
77. Bristles not as in HINDSIANA. Body uniformly
8. Anterior ocellus on a small elevation on the
vertex of the head, which does not overhang
the bases of the antennae.
9. No close lying scales at the base of the
tube. Head usually little or no longer
than the prothorax.
10. Mouth cone rounded.
57. HAPLOTHRIPS Serville.
1010. Mouth cone pointed.
58. NEOHEEGERIA Schmutz.
99. Tube in the male with closely appressed
scales at the base on each side. Head
pronouncedly longer than the prothorax.
88. Anterior ocellus on the elongated vertex of
the head projecting over the bases of the
cf. 77. LEPTOTHRIPS Hood.
66. Head narrowed posteriorly, with a strongly arched
vertex ..........-.~~....... 60. CRANIOTHRIPS Bagnall.
33. A sharp tooth-like process at the extremity of the fore tibia.
Fore tarsus also armed with a strong tooth.
22. Fore femora armed on the inside with a powerful tooth.
11. Bristles of the prothorax funnel-form, transparent, often recognizable
only on close examination.
2. Sixth antennal segment clearly separated from the 7th. Fore
femur in the male with one tooth on the inside.
22. The last three antennal segments apparently united.
1. Anterior angles of the mesothorax with two finger-like thorns and at their side
several smaller ones............. ......... ... ...................TETRACANTHOTHRIPS Bagnall.
11. Anterior angles of the mesothorax without finger-like projections.
2. Bristles of prothorax funnel-shaped, transparent.
22. Bristles of prothorax simple, clubbed or pointed at end, never funnel
3. Head pronouncedly broader than long.

Bulletin 168, Thysanoptera of North America 19

4. Head slightly narrowed posteriorly. The 7th and 8th antennal seg-
ments together but little longer than the 3rd.
44. Head broadest posteriorly. The 7th and 8th antennal segments clearly
separated from one another, each about as long as the third.
33. Head as long as broad or longer.
4. Antennae 8-segmented.
5. Head broadest posteriorly with sides clearly converg-
ing anteriorly.
6. Abdomen not broader than the pterothorax.
66. Abdomen noticeably broad, much broader than the
rpterothorax-...-.................64. EURYTHRIPS Hinds
55. Head not broadest posteriorly.
6. Abdomen with very short, weak bristles or with none.
7. Abdominal bristles present. Antennal segments not
noticeably short and thick .......GYMNOTHRIPS Karny.
77. Abdominal bristles absent. The middle antennal joints
noticeably short and thick ..............LISPOTHRIPS Reuter.
66. Abdomen with long bristles.
7. Mouth cone as long as the vertex of the head.
77. Proboscis pronouncedly shorter than the re-
mainder of the head.
8. Fore tibia armed at the end with a tooth.
88. Fore tibiae without teeth.
9. Tube not noticeably short, without long-
itudinal grooves.
10. Labrum sharply pointed, extending
beyond the broadly rounded mouth
cone. Antennae more than twice
as long as the head.
1010. Labrum blunt; when not the an-
tennae are less than twice as long
as the head.
11. Fore femur in both sexes greatly thick- MESOTHRIPS Zimmerman.
1111. Fore femur, at least in the female, weak.
12. Head clearly longer than broad.
13. Fore tarsi armed with a dis-
tinct tooth.
1313. Fore tarsus without tooth or
supplied with only a very small
crooked tooth.
14. Prothorax clearly broaden-
ing posteriorly.
1414. Prothorax gently widened
toward the posterior mar-
gin, at the most .4 broader
than the head.

Florida Agricultural Experiment Station

1212. Head scarcely or no longer than
broad. Eyes noticeably small.
13. Ocelli and wings lacking. Body
length 1.5 mm.
1313. Ocelli and wings present. Body
length 4.5 nm.
99. Tube about a third shorter than the
head with several deep longitudinal
grooves.-...67. BARYTHRIPS H. & W.
44. Antennae 7-segmented.
5. Eyes bulging like balls. Head conspicuously constricted
behind the eyes. The surface of the body with poly-
gonal net-like sculpture -... 68. GLYPTOTHRIPS Hood.
55. Eyes not protruding. Head behind eyes not constricted.
No net-like sculpturing.
6. Ocelli present.
7. Fore femur strongly thickened, as a rule more than twice
as long as the tibia........................NESOTHRIPS Kirkaldy.
77. Fore femur not so powerful. Fore tarsus in
both sexes with a prominent tooth.
66. Ocelli absent. Wings reduced or absent.

1. Fore femur, at least in the male, armed with a strong tooth.
2. Tooth of the fore femur present in both sexes.
3. Fore tibia unarmed.
4. Antennae twice as long as the head. Prothorax posteriorly only about
a third broader than the head................MICROCANTHOTHRIPS Bagnall.
44. Antennae rarely more than 1.5 times as long as the head. Posterior
margin of prothorax at least one and a half times, even twice, as broad
as the head................. ................. ................................. ANDROTHRIPS Karny.
33. Fore tibiae with a finger-like projection near the middle of inner surface.
22. Tooth of the fore femur present only in the male. Fore tibia in
the male on the inner side with three distinct teeth.
11. Fore femur in both sexes unarmed.
2. Fore tibia armed with a AGNOSTOCHTHONA Kirkaldy.
22. Fore tibia unarmed.
3. Head scarcely or no longer than broad, but longer than the pro-
4. Eyes small, mouth cone long; wings not closely fringed,
no interlocated hairs.............72. GASTROTHRIPS Hood.
44. Eyes large, mouth cone short; wings closely fringed, with
many interlocated bristles.
73. TREHERNIELLA gen. nov.
33. Head decidedly longer than broad.
4. Antennae 8-segmented.
5. A well-developed bristle on each side of the anterior

Bulletin 168, Thysanoptera of North America 21

6. Prothorax narrower, anterior margin not emarginate
and thickened .....74. DICERATOTHRIPS Bagnall.
66. Prothorax more than 2.5 times as wide as median length, an-
terior margin of pronotum deeply, roundly emarginate and
somewhat thickened.......................................PAULOTHRIPS Hood.
55. No large bristles beside the anterior ocellus.
6. A conspicuously long strong bristle on each side
behind the hind ocellus.
66. No strong bristles behind the hind ocellus.
7. Eyes very large, almost touching.
77. Eyes not unusually large.
8. Seventh antennal segment distinctly separated
from the 6th.
9. Anterior ocellus placed on the elongated
vertex which overhangs the insertion of
the antennae, directed forward.
99. Fore ocellus on a small elevation on the
vertex which does not project over the bases
of the antennae.
10. Fore femur, at least in female, slender.
11. Fore femur conspicuously bent, with a broadly
angular concave inner margin.
1111. Fore femur not conspicuously bent
with an almost straight margin.
12. Head but little longer than broad. Body
length 4.5 mm.........HOLOTHRIPS Karny.
1212. Head distinctly longer than broad.
13. Wings reduced or narrowed in
14. Mouth cone broadly rounded.
15. Fore femur in the male
very much thickened.
1515. Fore femur in both sexes slen-
1414. Mouth cone contracted, round-
ed only at the tip. Fore femur
in both sexes 59.
1313. Wings fully developed, not nar-
rowed in the middle.
14. Light yellow and marbled with
purplish. Fore tarsi in both sexes
with a tooth.
1414. Differently colored. Fore tar-

22 Florida Agricultural Experiment Station

si, at least in the female, un-
15. Fore femur in both sexes
16. Head at least three-
fourths longer than
broad ...-..............----- 78.
1616. Head at most two-thirds
longer than broad.
17. Tube nearly as long
or longer than the
head ......................78.
1717. Tube clearly shorter
than the head.
18. Antennae less than
twice as long as
the 78.
1818. Antennae about twice
as long as the head.
19. More than ten ac-
cessory hairs on
wing. Dark, with-
out any conspic-
uously lighter col-
1919. Less than ten
accessory bristles.
Reddish yellow or
partly red or with
light yellow cross
1515. Fore femora in the male
thickened. Fore tarsus, at
least in the male, usually
armed with a tooth.
1313. Wings lacking.
1010. Fore femur in both sexes thickened.
11. Labrum not sharply pointed at end. Abdom-
inal bristles not especially long.
1111. Labrum sharply pointed, exceeding
the mouth cone. The bristles on the

Bulletin 168, Thysanoptera of North America

last abdominal segment very long, ex-
ceeding the tube.
12. Middle antennal segments long and
1212. Middle antennal segments short.
81. KARNYOTHRIPS nov. nom.
88. The last three antennal segments broadly joined to-
gether, apparently forming one segment.
44. Antennae 7-segmented.
5. Head pronouncedly longer than broad, slightly but
clearly narrowed toward the middle, broadest poste-
riorly ...--............-..82. POLYPHEMOTHRIPS Schmutz.
55. Head barely longer than broad, broadest about the
middle; above this point at the posterior margin of the
eyes, strongly constricted.
cf. 68. GLYPTOTHRIPS Hood.
1. Abdominal segments two to eight without a tooth. Tube less than
five times as long as the 9th abdominal segment.
2. Head extending not at all or but little beyond the eyes; fore
angles of the prothorax and fore femur unarmed. Tube longer
than the 9th abdominal segment.
3. Head shorter. Cheeks without thorns. Prothorax without
sculpturing or little humps. Tube at least four times as long
as the 9th abdominal segment.
4. Abdomen of male not flattened.
83. GIGANTOTHRIPS Zimmerman.
44. Male with flattened abdomen. Hind wing with median vein.
33. Head longer. Cheeks set with more or less strong thorns.
Prothorax with sculptures or little humps. Tube less than
four times as long as 9th abdominal segment.
4. Eyes prolonged posteriorly on ventral side, anterior margin of pro-
thorax thickened.......................................OPHTHALMOTHRIPS Hood ('19).
44. Eyes and prothorax not so.
5. A strong sickle-shaped, bent bristle on the outside at
the end of the fore femur of the male.
55. Fore femur of the male without sickle-shaped bristles.
22. Head extending far beyond the eyes. The end of the fore femur in front usually
with a tooth.
3. Tube but little or no longer than the 9th abdominal segment.
4. Anterior angles of the prothorax with a large thorn.
44. Anterior angles of the prothorax unarmed..........KLINOTHRIPS Bagnall.
33. Tube about three times as long as the 9th abdominal segment. Fore femur
(at least in the male) very much enlarged.
4. A strong blunt hump in the middle of the inner margin of the fore
femur in the male. Fore tibia at the end armed with a sharply angular
tooth .................................................. ..........................PHOXOTHRIPS Karny.

24 Florida Agricultural Experiment Station

44. The middle inner margin of the fore femur without little humps. Fore
tibia at the end only broadened, with blunt angles.
11. Abdominal segments two to eight (at least in the male) armed at the side with a
posteriorly directed tooth. Tube from five to seven times as long as the 9th abdom-
inal segment.
2. Head about twice as long as broad. First antennal segment armed with a strong
thorn ........................................ ..................... ......ACTINOTHRIPS Bagnall.
22. Head not quite three times as long as broad. First antennal segment without
a thorn.
3. Bristles on the head normally developed, not especially long.
33. A short thick laterally-directed thorn on each tide of the anterior ocellus.
Postocular bristles and a pair between them and the posterior margin
strongly developed, clearly longer than the width of the head.

1. Anterior ocellus separated farther from the two side ones than these are from one
another ................................................... .........................Subfamily BACTROTHRIPINAE.
11. Anterior ocellus not separated farther from the two side ones than
these are from one another -..-..........-... Subfamily MEGATHRIPINAE.

1. Horned process of the 6th abdominal segment as a rule extending be-
yond the end of the 7th segment, bent outwardly.
2. Tube of the female six times as long as the 9th abdominal segment.
22. Tube at most four times as long as the 9th segment.
3. Prothorax much broader than long. Eighth abdominal seg-
ment in the male simple. Body bristles comparatively long.
Antennae shorter, the middle segments not very abruptly
clubbed........................-............ 86. MEGALOTHRIPS Uzel.
33. Prothorax not so markedly short ("quer"). Eighth abdominal segment in
the male with a pair of side processes. Body bristles comparatively short,
the antennae longer, the middle segments abruptly clubbed.
MEGOTHRIPS Targioni-Tozzetti.
11. Horned process of the 6th male abdominal segment not reaching to the end of the
7th segment, straight or bent toward the inside.
2. Body broad and strong. Prothorax much broader than long. Head twice as long
as the prothorax. Horned processes of the 6th male abdominal segment bent
sharply inward. The 7th and 8th segments simple............SIPHONOTHRIPS Buffa.
22. Body slender and linear. Prothorax not so short (strongly transverse). Head
three times as long as the prothorax. The processes of the 6th male abdominal
segment fairly straight and parallel. The 7th and 8th segments with a pair of
lateral processes..................... ...... .................... .... BACILLOTHRIPS Buffa.

Only one genus.


Bulletin 168, Thysanoptera of North America


1. STOMATOTHRIPS Hood ('12f)
1. Stomatothrips flavus Hood ('12f).
"Grass and Weeds."
Ill., Tex., Mexico.

2. ERYTHROTHRIPS Moulton ('11, p. 34)
Key to the Species.
a. Third antennal segment dark.........................................arizonae.
aa. Third antennal segment yellow........................... .........durango.
2. Erythrothrips arizonae Moulton ('11, p. 35).
In orange and olive blossoms, Phoenix, Ariz.; on Rhamus pur-
shina, Ciot, Cal.
3. Erythrothrips durango, n. sp.
Durango, Mexico, Agave flowers.

3. OROTHRIPS Moulton ('07)
4. Orothrips kellogi Moulton ('07, p. 45).
Manzanita manzanita and Arbutus Menziesii.
5. Orothrips kellogi yosemitii Moulton ('11, p. 34).
On Ceanothus, Cal.; Amelanchier, B. C., Treherne ('19).
4. ANKOTHRIPS Crawford ('09 b)
6. Ankothrips robustus Crawford ('09b, p. 100, figs.).
On California laurel (Umbellularia californica) and Ceanothus,
Claremont and Los Gatos, Cal.
Key to the Species.
1. Fore wings with dark cross bands.
a. Wings with cross veins.
b. Last four segments of antennae much longer than 5; abdomi-
nal segments 2 and 3 and the posterior half of 1 white or
yellow ...-----.................- .....----- ..... ....----.............. --- bicolor.
bb. Last four segments of antennae little if any longer than 5.
c. Body banded with yellow or white.
d. Prothorax and segments 2 and 3 of abdomen white.
dd. Abdominal segments 2-6 golden yellow.....auricestus.
cc. Body brown, without bands.
d. Yellowish brown to dark brown; tip of antennal seg-
ment 2 and all but the tip of 3 nearly white, re-
mainder brown; fore wings with three white bands.
dd. Blackish brown with crimson hypodermal pigment;
antennal segment 3 and base of 4 pale yellowish white,
remainder blackish brown; basal .2 and apex of fore
wings white......... ........... ....................annectans.

Florida Agricultural Experiment Station

aa. Wings without cross veins; last four segments of antennae about
1.28 times as long as 5 --------.......---......---...--................nasturtii.
2. Fore wings with a dark longitudinal band along posterior margin.
a. With normal veins in the anterior wings.
b. Antennal segment 3 about as long as 1 and 2 together; head
not emarginate in front.
c. Segment 4 brown................. ........- ..-... ---........... kuwanaii.
cc. Segment 4 yellowish-white except the extreme tip.
bb. Antennal segment 3 much longer than 1 and 2 together; at
least basal third of segment 4 light yellow; head emarginate
in front.. ..............---- ----------------- .... .floridensis.
aa. Anterior wings without veins.
c. Head 1.2 times as wide as long; distance between eyes
noticeably greater than width of-eye; antennal segment
3 is 1.5 times as long as 1 and 2 together; 4 is 70 microns
long. ...-........ --... ...... ....... ..------ --.--....floridensis.
cc. Head but little wider than long; distance between eyes
about equal to diameter of eye; antennal segment 3 about
1.3 times as long as 1 and 2 together; 4 is 58 microns long.
ccc. Head as long as wide; distance between the eyes some-
what greater than their diameter; antennal segment 3 is
1.5 as long as 1 and 2 together; 4 is 85 microns long.
7. Aeolothrips bicolor Hinds ('02, p. 130, figs.).
Bindweed, Brunella, Panicum and various other grasses, oats,
Vernonia, kudzu, Cassia (Fla.) ; Plantogo, corn, onions, rutabagas
(Morgan, '13). Most common on grasses.
Feeds on onion thrips (Russell, '12).
Mass. to Minn. to Texas to Fla.
8. Aeolothrips albicinctus Haliday.
Mass., on grass; N. Y., on onions and corn (Hood, '15); Europe,
on grass.
9. Aeolothrips auricestus Treherne ('19, p. 184, figs.).
On Western wild rye grass (Elymus condensatus),
B. C.
10. Aeolothrips fasciatus (Linn.).
(Redescribed by Hinds, '02, p. 127, figs.).
On numerous grasses and herbs, reported to be predaceous.
Mass., Adirondack Mts., N. Y., to B. C. (Treherne, '19), Ore.,
Cal., Europe.
11. Aeolothrips annectans Hood ('16, p. 109).
On Erigeron annuus, pear, Robinia pseudo-acacia; "many shrubs,
onions, associated with and doubtless predaceous upon the onion
thrips" (Treherne, '19),
N. Y., Md., Va., B. C.
12. Aeolothrips nasturtii Jones ('12, p. 2, figs.).
On flowers of water cress (Nasturtium oficinale).
San Jose, Cal.

Bulletin 168, Thysanoptera of North America

Hood expresses the opinion that this species is the male of AE.
13. Aeolothrips kuwanii Moulton ('07, p. 47).
On Cal. lilac (Ceanothus thyrsiflorus), elderberry (Sambucus
glauca), chamisal (Adenostoma fascilatum), purple lupine
(Lupinus sp.), Santa Cruz Mts., Cal.
14. Aeolothrips floridensis Watson ('16, p. 126, figs.).
On oats and corn, Florida.
15. Aeolothrips longiceps Crawford ('09b, p. 101, figs.).
On Artemesia sp., Claremont, Cal. ("Almost certainly a male of
A. kuwanii Moulton."-Hood, '15, p. 162.)
16. Aeolothrips crassus Hood ('12b, p. 130 figs.).
On Hydrophyllum virginicum L., and wild grape. Probably
Md. (Hood, '17), Ill. on a conifer.
17. Aeolothrips vittipennis Hood ('12b, p. 129 figs.).
On hickory, honey locust (Gleditschia triacanthos), yellow locust
(Robinia pseudacacia).
Ill., D. C., Md. (Hood, '17).

Key to Species (from Hood, '15)
a. Antennae less slender, the third segment about 11 times as long
as greatest subapical width; segments 1-3 clear pale yellow; com-
bined lengths of segments 5-9 about 1.3 times as great as that of
segment 3; 3 about 2.5 times as long as 5. Fore wing near apex
with a rather poorly defined pale spot which does not attain the
ring vein. (Fla., Tex., Nicaragua, Panama.) ......-.....vespiformis.
aa. Antennae more slender, the third segment about 13 times as long
as greatest subapical width; segments 1-4 clear pale yellow; com-
bined lengths of segments 5-9 about equal to that of segment 3;
3 about 3.7 times as long as 5. Fore wing near apex with a large
distinct white area entirely occupying the space between the two
portions of the ring vein.
(Panama) ........-- ....... .... ------------ ---.....- ---......- ...... ..--tenuicornis.
18. Franklinothrips vespiformis (Crawford).
(Aeolothrips vespiformis Crawford, '09), Nicaragua, Fla. (cit-
rus, avocados), Cuba cocoanutss), Texas, Panama (Hood, '13c).
St. Vincent (Bagnall, '17, p. 21).
(Hood, '15) Predaceous on leaf-hoppers and whiteflies.
19. Franklinothrips tenuicornis Hood. ('15, p. 16, figs.).

7. MITOTHRIPS Trybom ('12)
20. Mitothrips petulans Bagnall ('15, p. 496, figs.).
On cacao leaves, associated with Selonothrips rubrocinctus.
Trinidad, W. I.

8: HETEROTHRIPS Hood ('08)
Key to the Species
I. Abdominal segments 1-7 at sides with contiguous irregular spines.

Florida Agricultural Experiment Station

a. Antennae with ten segments......-------......---------................decacornis.
aa. Antennae with nine segments.. .............................--borinquen.
II. Scales fringing abdominal segments with margins of even spines.
a. Without circles of distal sensoria on antennal segment 4.
(cf. also sericatus) ....---.................-- ......-.......-- ---- ----- ------....... salicis.
aa. Segment 4 of antennae with distal circles of sensoria.
b. Abdomen not pubescent................... .......---------arisaemae.
bb. Abdomen more or less pubescent.
c. Abdomen sparsely pubescent.
d. Whole antennae except base and apex yellow. Panama.
dd. Only segment 3 always yellow.............................lyoniae.
cc. Abdomen more densely pubescent.
d. IProthorax sculptured with anastomozing lines; spines
margining abdominal scales very long.
e. Antennal segment 3 blackish brown.........pectinifer.
ee. Antennal segment 3 yellow-------.......................mexicanus.
dd. Prothorax free of sculpture except for a few lines.
III. Abdominal tergites fringed posteriorly with hairs which are not at
all coalesced into scales.
a. Abdomen smooth .................................------- --- auranticornis.
aa. Abdominal pubescens comparatively dense.
b. Pronotum smooth; length about .84 mm.................------............minor.
bb. Pronotum striate.
c. Only tarsi and distal ends of tibiae yellow; third antennal
segment less than three times as long as wide.
d. Length 1 mm.; antennal segment 3 is 61 microns long,
orange tinted toward the apex.... --------..........................vitis.
dd. Length .75 mm.; antenna segment 3 is 48 microns
long, no orange......................-- ----- ---------...---- tiliae.
cc. At least fore tibiae entirely yellow; antennal segment 3
three or more times as long as wide.
d. First two pairs of legs entirely lemon yellow; third
antennal segment about three times as long as wide.
dd. Middle and hind femora, all but ends of tibiae, and
proximal two-thirds of fore femora mostly blackish
brown; third antennal segment 3.6 times as long as
w ide.............................------------------.................................analis.
21. Heterothrips decacornis Crawford ('09, p. 110, figs.).
On "a low native tree with small yellow flowers, also a shrub of
the family Malpighiaceae."
Guadalajara, Mexico.
22. Heterothrips salicis Shull. ('09, p. 220, fig.).
On catkins of Salix fluviatalis.
23. Heterothrips arisaemae Hood ('08, p. 362, figs.).
The Indian Turnip Thrips.
In blossoms of Jack-in-the-Pulpit (Arisaema triphyllum), honey-

Bulletin 168, Thysanoptera of North America

suckle, Rhododendron ulmiflorum, green dragon. (A. dracon-
tium), wild grape (Morgan, '13).
Ill., Tenn., Md., Va., Quincy, Fla. (Morgan, '13).
24. Heterothrips borinquen Hood ('15, p. 1, figs.).
In blossoms of an undetermined plant.
Porto Rico.
25. Heterothrips flavicornis Hood ('15c, p. 3, figs.).
In flowers of Brysonima crassifolia.
26. Heterothrips lyoniae Hood ('16, p. 112, figs.).
In flowers of Lyonia mariana.
New Jersey.
27. Heterothrips pectinifer Hood ('15, p. 5, figs.).
On Indian geranium.
28. Heterothrips mexicanus n. sp.
In flowers of Sphaeralcea cuspidata and Sida hederacea.
Durango, Mexico.
29. Heterothrips aesculi Watson ('15, p. 50, figs.).
(H. azalae Hood, '16, p. 110, figs.)
Common in blossoms of southern buckeyes (Aesculus pavia) and
Azalea nudiflora.
Md., Fla.
30. Heterothrips auranticornis Watson ('22, p. 36).
In heads of a compositae Helenium.
N. E. Georgia.
31. Heterothrips minor Hood ('15, p. 7, figs.).
In flowers of "Nance tree" (Brysonima crassifolia).
32. Heterothrips vitis Hood ('16b, p. 106).
In flowers of wild grape, smilax, poison ivy.
Md., D. C., Va.
33. Heterothrips tiliae Watson ('20b, p. 29).
On leaves of Tilia americana.
34. Heterothrips sericatus Hood ('13d, p. 66).
On guava.
Porto Rico.
35. Heterothrips analis Hood ('15c, p. 9, figs.).
On wild rose.
9. CORYNOTHRIPS Williams ('13, p. 210, figs.)
36. Corynothrips stenopterus Williams ('13, p. 210, figs.).
The Cassava Thrips.
On cassava and rarely papaya.
St. Vincent, W. I.
Key to the Species
1. A single median longitudinal vein in each fore wing.................mexicanus.

Florida Agricultural Experiment Station

2. Two longitudinal veins in each fore wing; fore wings brown.
a. Two long, stout spines at each posterior angle of the prothorax.
b. Antennal segment 6 about as long as 4 and 5 together.
bb. Segment 6 shorter than 4 and 5 together.
c. Head broader than long; posterior ocelli opposite posterior
margin of eyes; eyes triangular in outline; fore femora
about three-fourths as wide as head; antennae abruptly
narrowed at segment 7.................................----manicatus.
cc. Head longer than wide; posterior ocelli opposite posterior
third of eyes; eyes oval in outline; fore femora about as
wide as head; antennae gradually'narrowed to apex.
floridensis catchingsi.
aa. A single, long, stout spine at each posterior angle.
b. Abdomen usually yellow; thorax yellowish brown.......spiniceps.
bb. Color almost uniformly brown...............................--floridensis.
aaa. Spines at the posterior angles of the prothorax only moderately
b. Abdomen usually yellow.
c. Thorax yellowish brown .........-- ...-...--- -....... .................obesus.
cc. Thorax yellow ochre, shaded with gray ..................... ..vestis.
bb. Abdomen gray or grayish brown..................--------........ crassus.
37. Chirothrips mexicanus Crawford ('09, p. 114, figs.).
On flowers of tobacco (Nicotina tabacum).
Guadalajara, Mexico.
38. Chirothrips insolitus Hood ('15c, p. 11, figs.).
Va. Taken by sweeping.
39. Chirothrips manicatus Haliday.
(Redescribed by Hinds, '02, p. 134, figs.; C. longipennis Burm;
C. antennatus Osb. '83.)
On various grasses and cereals, clover, wild carrot.
Mass., N. Y., Pa., Md., Va., Fla., Tenn. (Morgan).
Ill., Ia., Kan., Neb., Ore., B. C. (Morgan, '13); N. Europe.
40. Chirothrips floridensis catchingsi n. var.
On grass.
New Orleans, La.
41. Chirothrips floridensis Watson ('20b, p. 21).
On Bermuda grass.
Seabreeze and Moore Haven, Fla.
42. Chirothrips obesus Hinds ('02, p. 137, figs.).
On Festuca ovina and Poa pratensis.
Amherst, Mass.
43. Chirothrips spiniceps Hood ('15c, p. 12, figs.).
On sugar cane, bamboo, privet.
La., Texas, Arizona.
44. Chirothrips vestis Hood ('15c, p. 15, figs.).
Taken by sweeping.
45. Chirothrips crassus Hinds ('02, p. 136, figs.).
On old witch grass (Panicum capillare), Allium.
Mass., Tenn., (Morgan, '13), Fla.

Bulletin 168, Thysanoptera of North America

11. LIMOTHRIPS Haliday
Key to the Species (after Jones, '12)
a. Segment 2 of antennae drawn out into a prominent, acute, triangu-
lar process on the outer angle-............................... angulicornis.
aa. Antennal segment 2 simple...-....-..........-..... ................cerealium.
46. Limothrips angulicornis Jablon ('94).
(L. setariae Jones, '12, p. 8, figs.)
On fox-tail grass (Setaria viridis), wild oats, and Cal. buckeye
(Aesculus californica), San Jose, Cal.;
Italy, Hungary, Armenia, Transcaucasia (Karny, '14).
47. Limothrips cerealium Haliday.
(L. avenue Hinds, '02, p. 139, figs.)
On Festuca pratensis, oats, onions, rye.
Mass., Pa., Md., Va., Fla., Tenn. (Morgan, '13), Ind., III., Kan.,
Texas (Hood, '17) ; Europe, N. Africa, H. I.

12. SERICOTHRIPS Haliday, 1835
Key to the Species.
(Adapted from Jones, '12.)
a. Wings fully developed or rudimentary.
b. Wings fully developed; abdomen without a white band.
c. Fore wings white, no dark cross bands or shading; gen-
eral color white ....... .....................................albus.
cc. Fore wings dusky or gray-brown and more or less dis-
tinctly marked with one or more whitish cross bands.
d. General color yellowish dusky-gray..................variabilis.
dd. General color pale brownish yellow with numerous
distinct dark brown markings............................baptisiae.
ccc. Fore wings white with a grayish-brown spot and cross
band; general color brownish black, prothorax and in-
termediate abdominal segments light yellow-brown.
cccc. Fore wings black, with two broad white cross bands and
white tip; general color blackish, pterothorax somewhat
lighter ....... ---.....--... -..... -.................... pulchellus.
bb. Wings reduced or fully developed; body dark brown to nearly
black, except segments 4 to 6 of abdomen which are almost
white --. .......----.......---- ---- cingulatus.
aa. Wings wanting.
b. Body very dark brown, nearly black; pterothorax yellow to
yellow-brown; legs brown.........---------.........................apteris.
bb. Body uniformly brown; surface of body strongly reticulated;
legs yellow .----..............................----------------reticulatus.
bbb. Body and legs uniformly brown; four stout spines on the
dorsal side of segment 9 .................... ............ stanfordii.
48. Sericothrips albus Jones ('12, p. 6, figs.).
On blossoms of elderberry (Sambucus sp.) and weeds.
Visalia, Cal.
49. Sericothrips variabilis (Beach).
(Redescribed by Hinds, '02, p. 143, figs.)

Florida Agricultural Experiment Station

Amelanchier, clematis, clover, cucumber, elm, grass, hackberry,
hawthorn, cotton, Ceanothus, smartweed.
Mass., Tenn. (Morgan, '13), Ia., Tex. (Morgan, '13), Cal., B. C.
(Treherne), Miss. (R. W. Harned).
50. Sericothrips baptisiae Hood ('16, p. 113).
On Baptisia tinctoria.
Va., Md.
51. Sericothrips moultoni Jones ('12, p. 6, figs.).
On a large perennial lupine.
San Jose, Cal.
52. Sericothrips pulchellus Hood ('08, p. 363).
On hop-tree (Ptelea trifoliata).
Ill., Md. (Hood, '17).
53. Sericothrips cingulatus Hinds ('02, p. 141, figs.).
On grasses, Plantago.
Mass., Md. and Ill. (Hood, '17); Tenn. (Morgan, '13); Neb.
54. Sericothrips apteris Daniel ('04).
(Redescribed by Moulton, '07, p. 49; male described, Jones, '12,
p. 6, figs.).
On various grasses and weeds.
Central Cal.
55. Sericothrips reticulatus Moulton ('07, p. 50, figs.).
On grass and weeds.
Santa Clara Valley, Cal.
56. Sericothrips sanfordi Moulton ('07, p, 51, figs.).
On grasses and various weeds.
Central Cal.; B. C. (Treherne).

13. APTEROTHRIPS Bagnall ('08, p. 193)
57. Apterothrips subreticulata Bagnall ('08, p. 183).
On masset, Queen Charlotte Is.; on Lupinus arcticus, Mt. McLean,
B. C. (Treherne).
14. SCIRTOTHRIPS Shull ('09)
Key to the Species
1. Antennae seemingly 9-segmented. (Subgenus Proscirtothrips Karny.)
a. Head about as long as wide; wings gray-brown with transparent
area near the base; abdominal segments 5-8 without comb-like
arrangement of spines along posterior margins; color uniformly
yellow to gray-brown; antennal segment 3 not pedicellate -....zeae.
aa. Head noticeably wider than long; antennal segment 3 pedicellate.
b. Wings not unusually long; transparent; abdominal segments
5-8 with conspicuous comb-like arrangement of spines along
the posterior margins; head and prothorax yellowish to
orange-yellow, abdomen brown-...................-------------tricolor.
bb. Wings very long, light brown, with clear area near base; ab-
dominal segments without comb-like arrangements of spines;
color brownish-yellow to yellowish-white------..................longipennis.
2. Antennae 8-segmented.
a. General color yellow; posterior vein of fore wing with three

Bulletin 168, Thysanoptera of North America

b. Uniformly yellow, including antennae; anterior vein of fore
wing with 10 or 11 bristles; ocelli sub-approximate ....ruthveni.
bb. Head whitish, prothorax shaded with gray; anterior vein with
8 or 9 bristles; ocelli approximate; wings short; antenna
segment 1 pale yellow, 2-8 dark brown............brevipennis.
bbb. Yellow to orange-brown, thorax noticeably orange brown;
antenna segment 2 orange-yellow, others uniformly light
brow n .... ...-...........-.. ........ ......................................... .. citri.
aa. Color white or almost; posterior vein with two bristles.
b. Color translucent white, tinged yellowish brown; anterior vein
with nine bristles; antenna segment 3 not pedicellate......albus.
bb. Anterior vein of fore wing with three nearly equidistant bris-
tles in distal half; antennal segment 3 pedicellate............niveus.
58. Scirtothrips (Proscirtothrips) zeae (Moulton). (Karny, '09.)
(Anaphothrips zeae Moulton, '11, p. 41, figs.)
On citrus, corn, grasses and weeds.
Visalia, San Jose, and Red Bluff, Cal.
59. Scirtothrips (Proscirtothrips) tricolor (Moulton).
(Anaphothrips tricolor Moulton, '11, p. 41.)
On orange trees and golden-rod.
Tulare Co., Cal.
60. Scirtothrips (Proscirtothrips) longipennis (Crawford).
(Anaphothrips longipennis Crawford, '10, p. 150, figs.; Euthrips
parvus Moulton, '11.)
On various hothouse plants, olive.
Cal., Denmark, Sweden (Thompson, Ent. Medd. XIV, No. 2-3,
pp. 110-119, Copenhagen, 1923).
61. Scirtothrips ruthveni Shull ('09, p. 222, figs.).
On Cornus stoloniferc, leaves of mountain laurel (Kalmia lati-
folia) (Hood, '17).
Mich., Md.
62. Scirtothrips brevipennis Hood ('14, p. 18).
On Juniperns cirginiana.
63. Scirtothrips citri (Moulton). The California Orange Thrips.
(Euthrips citri Moulton, '09.)
On citrus, night-shade, thistle (?).
Cal., Ariz.
64. Scirtothrips albus (Jones).
(Anaphothrips albus Jones, '12, p. 16, figs.)
On monkey flower (Mimulus sp.)
San Jose. Cal.
65. Scirtothrips niveus Hood ('13b, p. 161).
On Cornus florida leaves.
Md. (Hood, '17).

15. ECHINOTHRIPS Moulton ('11, p. 37)
Key to the Species
a. Wings uniformly dark brown except for an elongated whitened
area near the base, costal vein with 13 bristles, fore longitudinal

Florida Agricultural Experiment Station

with 10; antennal segment 2 more than three times as long as 1.
aa. Basal .2 and tip of fore wings gray, costa with 15-19 bristles,
fore vein 13 or 14; antennal segment 2 less than twice as long as 1.
66. Echinothrips mexicanus Moulton ('11, p. 37, figs.).
Acapulco, Mexico.
67. Echinothrips americanus Morgan ('13, p. 14, figs.).
On bean, Indian-poke, Magnolia grandiflora, Polymnia, touch-
me-not, Adicea, Cassia, grass.
Fla., Md. (Hood, '17), D. C., Tenn., Mo.

Key to the Species
a. Antennae little if any more than twice as long as the head.
b. Fore wings white, without complete dark cross bands; legs
clear lemon yellow.
c. Fore wings shaded with brown along the veins; larger.
cc. Apex dark and a light cloud of brown at fork of the veins;
length about 1 mm....................................---- punctipennis.
bb. Fore wings with dark cross bands.
c. Fore wings with a brown apex and band at fork of veins
connected by narrow brown line along posterior margin.
cc. Both apex and base brown, no marginal brown line.
d. One wide dark band across the middle of fore wings;
intermediate antennal segments nearly white.
dd. Two dark brown bands across the middle of fore wings;
intermediate antennal segments pale yellow.
aa. Antennae distinctly more than twice as long as the head.
b. Antennae from 2.3 to 2.5 times as long as head; fore wings
dark (including apex), with two white bands.
c. Notum of abdominal segments 1-8 closely striated later-
d. Color nearly black, head and thorax lighter.....striatus.
dd. Color yellowish brown............---..................------phaceoli.
cc. Abdomen not striated-......... ------- ...........----. asciatus.
bb. Antennae about three times as long as the head; fore wings
light brownish-yellow (including apex) with two dark brown
bands and a brown area at extreme base; veins darker.
68. Heliothrips haemorrhoidalis (Bouche). The Greenhouse Thrips.
(Redescribed by Hinds, '02, p. 168, figs.)
A common greenhouse pest in northern United States, lives out
of doors in Ga., Fla., and the W. I., where it is especially common
on Coleus, Croton and avocados. Also on citrus, cocoanuts,
maple (Acer rubrum), magnolia, royal palm, japonica, mangoes,

Bulletin 168, Thysanoptera of North America

Aspidium, azaleas, dahlies, ferns, guavas, hibiscus, Pellea has-
tata, phlox, pinks; Palestine (on orange, Morgan, '13);-Ceylon
(on Garcinia mangostana).
69. Heliothrips punctipennis Hood ('12b, p. 135).
On Bermuda grass (Cynodon dactylon).
Mexico, Brownsville, Texas.
70. Heliothrips marginipennis Hood ('12b, p. 136).
In sweepings.
Monterey, Mexico.
71. Heliothrips cinctipennis Hood ('12b, p. 137).
Grass and weeds.
72. Heliothrips fascipennis Hinds ('02, p. 171, figs.).
Grasses and cotton.
Mass., Cal., Mexico (Morgan, '13).
73. Heliothrips striatus Hood ('13).
On Liriodendron tulipifera leaves.
Md., Va. and D. C. (Hood, '17), Ill., Tenn. (Morgan, '13, as H.
fasciatus Hood, '17).
74. Heliothrips phaseoli Hood ('12, p. 113, figs.).
Beans, Phaseolus sp., kudzu.
Mexico, Texas, Fla.
75. Heliothrips fasciatus Pergande. The Bean Thrips.
(Redescribed by Hinds, '02, p. 174, figs.; Russell, '12c).
Beans, beets, bur clover, cotton, alfalfa, Cassia, lettuce, apple,
Lotus glaber, oranges, peas, pears, pine, peach, poplar, vetch.
Cal., Ariz., Nev., Idaho, Tenn. (Morgan, '13)., Fla.
76. Heliothrips femoralis Reuter.
(Redescribed by Hinds, '02, p. 172, figs.)
Amaryllis, Aralia, arum, banana, Cestrum nocturum, chrysanthe-
mum, Crimum, cucumber, Dracaena sp., Eucharis grandiflorus,
Ficus, lily, begonia, spinach, sweet potato, Mexican tea (Chena-
podium ambrosoides), gardenia, cotton, Hydrangea, Mina lobata,
moonflower, Pandanus, Phoenix, potato, Richardia aethopica,
tomato, Vitis, sugar beets, Phymotodes, tree fern, royal palm;-
Eranthemum purpureum, Carica sp., Caryota, Cassia, Chanmae-
dorea, Cotoneaster foveolata, Delostoma roseum.
Mass., D. C., Fla., Md., N. Y., O., Ill., Neb., Va., Porto Rico (on
sugar cane, Hood, '14b), Santo Domingo, Europe, East Africa.

77. Parthenothrips dracaenae (Heeger).
(Redescribed by Hinds, '02, p. 176, figs.)
On Dracaena, Ficus elastica, Kentia belmoraena, Aralia(?), sago
palm (Cycas revoluta) in greenhouses.
Mass., N. J., D. C., Cal., N. Europe.

78. Prosopothrips cognatus Hood ('14e, p. 57). The Wheat Thrips.
(Ref. O. G. Kelly, Jl. Ag. Research, Vol. 4, No. 3, p. 219, figs.)

Florida Agricultural Experiment Station

Various grasses and especially wheat.
Kan., Okla., Mo., Neb.

19. CTENOTHRIPS Franklin
Key to the Species
a. Ventral sclerites of abdomen thickly set with transparent dots;
antennal segment 3 and base of 4 light brownish yellow; prono-
tum with deep polygonal reticulations.--....................... floridensis.
aa. No transparent dots on ventral side of abdomen; pronotum with
only anastomizing transverse striations.
b. Entire body and legs deeply reticulated; antennae uniform light
brown except the white bases of segments 3 and 4 and tip of 3.
bb. Reticulations faint; antennal segments 3-5 yellow.....bridwelli.
79. Ctenothrips reticulatus (Crawford).
(Dictyothrips reticulatus Crawford, '10b, p. 155, figs.)
"On blossoms of a native acacia-like tree," (Crawford).
Guadalajara, Mexico.
80. Ctenothrips floridensis (Watson).
(Dictyothrips floridensis Watson, '19b; '22d male.)
Guava, Passiflora, Rubus, Arracacia xanthorihisa, Prunus.
Plant Introduction Gardens Miami and Brooksville, Fla.
(Apparently introduced).
81. Ctenothrips bridwelli Franklin.
On trilium and mandrake (Podophyllum peltatum).
N. H., Va., Md. (Hood, '17), D. C., Tenn. (Morgan, '13), Ill.,

82. Selenothrips rubrocinctus (Giard). The Red-banded Thrips.
(Heliothrips (Physopus) rubrocinctus Giard; Ref. United States
Dept. Agr., Bul. 99, pt. 2, Russell, '12.)
Avocado, almond, cashew, Catalpa, camphor, cacoa, Eugenia,
guava, hog plum, Inga, kola, live oak, mammy apple, mango, roses,
Spondia, Terminalia.
S. Fla., W. I., Ceylon, H. I., Mauritius, Uganda.

21. SCOLOTHRIPS Hinds ('02)
83. Scolothrips sexmaculatus (Pergande).
(Thrips sexmaculatus Pergande, '94; Redescribed by Hinds, '02,
p. 157, figs.)
On beans, blackberry, citrus, elm, hop, juniper. Predaceous on
red spiders.
N. Y., Md. (Hood, '17), S. Car., Fla., Wis., Ill., Ia., Mo., Neb., H. I.

(Euthrips Targioni-Tozzetti)
Key to the Species
I. Postocular bristles short or wanting; row of bristles along the an-
terior margin of the prothorax wanting or at least inconspicuous
except often the third from the outer angle.

Bulletin 168, Thysanoptera of North America

a. Antennae uniformly brown to dark brown, concolorous with the
body; wings light brown, veins prominent; spines brown, 16-22 on
fore vein, 13-17 on hind, short and comparatively stout, a white
longitudinal area near the base of the wing............................. minute.
aa. Antennal segment 3 yellowish, 4 and 5 light grayish brown, yellow-
ish at the base; wings gray-brown, veins not prominent, spines
on the legs normally long and stout, 14 on fore vein, 10 on hind.
II. Postocular bristles conspicuous.
a. Second segment of antennae enlarged on dorsal side on the an-
terior end (asymetrical in side view) and bearing two bristles
much heavier than the others.
b. Vertex of the head depressed and anterior ocellus directed
forward; mouth cone short, reaching but little beyond the
middle of the prosternum.
c. Antennal segment 3 a little longer than 2; abdomen slender.
d. Body yellow, surface not reticulated.......... ..cephalica.
dd. Color uniformly brown; surface of body reticulated.
cephalica reticulata.
cc. Antennal segments 2 and 3 about equal in length; abdomen
short; color yellow, tinged with orange and brown.
cephalica masoni.
bb. Vertex of the head not markedly depressed; thorax orange;
anterior ocellus directed nearly vertically; mouth cone longer.
tritici bispinosus.
aa. Second segment of antennae symmetrical, none of its bristles
markedly enlarged. (Slightly so in tenuicornis.)
b. Thorax tinged with orange; (bright cinnamon brown in
stylosa). Head not rounded in front.
c. General color brownish yellow, not uniform; thorax orange-
yellow; antennal segment 1 pale yellow; 2 light brown,
base sometimes yellowish -. .. ......... ................. .....tritici.
cc. General color brown to dark brown; thorax orange-brown.
tritici californica.
ccc. Head pale lemon yellow to light yellowish brown or gray;
abdomen brownish yellow to blackish brown; antenna seg-
ment 1 whitish to light brown, 2 dark brown.
d. Antennal segments 3-5 pale yellow at the base; fore
wings yellowish .......................................occidentalis.
dd. Antennal segments 3-5 light brown or slightly gray
at base; fore wings brown or shaded.
e. Antennal segment 8 much longer than 7 ......stylosa.
ee. Segments of antennal style subequal........varicorne.
cccc. Color pale yellow with some orange shadings; antenna
segments 1-5 mostly light yellowish........................williamsi.
bb. Body brown; thorax reddish brown; head markedly rounded
in front; antennal segments 3 and 4 yellow..............tenuicornis.
bbb. Color yellowish gray to brownish yellow, shaded with brown;
no orange.

Florida Agricultural Experiment Station

c. Costa of wing with 23-30 bristles; fore vein 17-22; hind
d. Scale with 6 bristles; head nearly as long as wide;
antennal segment 2 dark brown; tenth abdominal seg-
ment not split open above...................-- ..........helianthi.
dd. Scale with 5 bristles; head .75 as long as wide; an-
tennal segment 2 yellowish gray; tenth abdominal seg-
ment split open above.......................-----... ............ gossypii.
cc. Costa of wing with 15-19 bristles; fore vein 13-16; hind
9-10; scale 5-....................... ... ........... ................. runner.
bbbb. General color uniformly brown to dark brown, no orange;
antennal segments 3-5 light brown to yellow and shaded.
c. Color of body dark brown to black; wings brownish gray
to dark brown, the basal fourth to a third clear.
d. Bristles, especially on prothorax and wings very long
and heavy; prothorax considerably longer than head.
Large, 1.6 mm. or more.
e. Bases only of middle and hind femora and tibiae
clear pale yellow ........ .................. ...... ..... annulipes.
ee. All tarsi and tibiae, and most of fore femora pale
lemon yellow -----......... -------.. ..... .............citripes.
dd. Bristles long but slender; body length about 1.4 mm.;
prothorax about as long as head; all tarsi and tibiae
lemon yellow ..........--... -- .......-.....................auripes.
ddd. Bristles moderate; middle and hind tibiae and femora
deep brown; prothorax longer than head. Length
about 1.4 mm.-......--............-.-- .....- ----........... .... insularis.
cc. Body color yellowish brown, fore wings uniformly shaded
with gray ............------------.............. .......... ........nervosa.
84. Frankliniella minute (Moulton).
(Euthrips minutus Moulton, '07; Euthrips minutus setosus Craw-
ford, '09; Crawford, '10, p. 149.)
On prune and cherry foliage, pear and cherry blossoms, Monar-
della lanceolata, Sambucus glauca, grass, yarrow, chamisal, but-
tercups, sunflowers, Rhamnus crocea.
So. Cal., Texas, Mexico, Panama (Hood, '13c).
85. Frankliniella fusca (Hinds).
(Euthrips fuscus Hinds, '02, p. 154, figs.; Desc. of male, Morgan,
'13, p. 11; Euthrips nicotinae Hinds, '05; ref., Bur. Ent. United
States Dept. Ent., Circ. 68, figs. 1906; bul. 65, figs. 1907.) The
Tobacco Thrips.
On Allium, broom sedge, Cercis canadensis, cotton, dandelion,
dewberry, Gnaphalium, grass, Kalmia latifolia, mustard, oats,
peanuts, Quamasia, sorrell, shepherd's purse, Tilia americana,
tobacco, turnips, Plantago Virginica.
Mass. to So. Dakota, Kansas, Tex., Fla.
86. Frankliniella cephalica (Crawford).
(Euthrips cephalicus Crawford, '10b, p. 153, figs.; Frankliniella
melanommatus Williams, '13, p. 213, figs.)

Bulletin 168, Thysanoptera of North America

On "several compositae, a small native acacia-like tree, a So-
lanum, and several other plants." (Crawford.)
Guadalajara, Mexico, Trinidad (Bagnall, '19, p. 263), St. Vin-
cent (Williams, '13) on cassava.
87. Frankliniella cephalica reticulata (Crawford).
(Euthrips cephalica reticulata Crawford, '10b, p. 155.)
On certain Roseceae and Labiatae.
Guadalajara, Mexico.
88. Frankliniella cephalica masoni Watson ('19b, p. 3).
On a large number of blossoms.
So. Fla.
89. Frankliniella tritici bispinosa (Morgan).
(Euthrips tritici bispinosus Morgan, '13, p. 10, figs.; F. tritici
projects Watson, '15.) The Florida Flower Thrips.
"Quite destructive to blossoms of citrus, tomatoes, roses and
small fruits." (Watson, '22b.)
Florida, where it almost entirely replaces F. tritici in blossoms.
90. Frankliniella tritici (Fitch).
(Euthrips tritici Fitch, '55; redescribed by Hinds, '02, p. 148,
In blossoms of nearly all plants. The common flower thrips of
the United States.
Generally distributed over the entire United States from N. H.
to Washington and Cal. but rare in Fla.
(?) Porto Rico (Hood, '15e) (Probably cephalica).
91. Frankliniella tritici califorriica (Moulton).
(Euthrips tritici californicus Moulton, '11; Frankliniella tritici
noultoni Hood.)
Occurs in blossoms like the species.
Cal. to B. C.;-Wyoming.
92. Frankliniella occidentalis (Pergande).
(Euthrips occidentalis Pergande, '95; redescribed by Hinds, '02,
p. 152.)
On snap beans and mango, So. Fla. (Morgan, '13). "Blossoms
and foliage of numerous trees and weeds," potatoes.
Cal. and So. Fla.
93. Frankliniella stylosa Hood ('12b, p. 134, figs.).
(Euthrips floridense Morgan, '13, p. 5, figs.)
On Asclepias variegata, and in blossoms of Chionanthus vir-
ginica, Catalpa catalpa, Virburnum acerifolium; "nigger-head"
Md., Va., Fla.;-Durango, Mexico (F. F. Bibby, Coll.).
94. Frankliniella varicorne Bagnall ('19, p. 268).
On Petalostemon purpureum.
95. Frankliniella williamsi Hood ('15, p. 19, figs.).
Between husks of corn; on sugar cane.
Va., D. C. (Hood, '17); Cuba, Mexico (Morgan).
96. Frankliniella tenuicornis (Uzel).
On grass.
Rabun Co., Ga.; Europe.

Florida Agricultural Experiment Station

97. Frankliniella helianthi (Moulton).
(Euthrips helianthi Moulton, '11.)
In blossoms of wild sunflower.
Visalia, Cal.
98. Frankliniella gossypii (Morgan).
(Euthrips gossypii Morgan, '13, p. 9, figs.)
On cotton.
99. Frankliniella runner (Morgan).
(Euthrips runner Morgan, '13, p. 7, figs.)
About the roots of Aster sp., Feb. 2.
100. Frankliniella annulipes Hood ('15c, p. 16, figs.).
"Flowers of a common shrub."
101. Frankliniella citripes Hood ('16, p. 115).
On citrus blossoms.
102. Frankliniella auripes Hood, '15c, p. 18.
On "Jerusalem cherry."
103. Frankliniella insularis (Franklin).
(Euthrips insularis Franklin, '08, p. 715, figs.; Euthrips insul-
aris reticulata Crawford, '09.)
On arrowroot, Carissa grandiflora, citrus, beans, Compositae,
Convolvulus, flamboyant, grass, Erythrina, lima beans, Cassia,
roses, sweet potatoes, lantana, ground nut, Lupinus, pawpaw,
pepper, potato, Rhamnus, tobacco, velvet beans, white wood, black
willow, woolly pyrol, yams; chiefly legumes.
An abundant thrips in Cen. America, Mexico, Barbados, Vene-
zuela (Bagnall, '19), Cuba, Brownsville, Tex. (Russell, '12),
So. Fla. (A. C. Mason Coll., Watson, '20), Porto Rico (Hood,
'13e, p. 149), Panama (Hood, '13c), Trinidad (Bagnall, '15),
St. Vincent (Bagnall, '17).
104. Frankliniella nervosa (Uzel).
(Euthrips nervous Uzel; redescribed by Hinds, '02, p. 155, figs.;
Thrips maidis Beach.)
On cat tails (Morgan, '13), corn, "various grasses and spring
flowers" (Moulton).
Mass., N. Y., Pa., Tenn., Md., Va., Ind., Ill.; Czecho-Slovakia.
(Hood, '17, expresses the opinion, based on ecological grounds,
that the American species is different from the European. If
this should prove to be true, the American species becomes F.
maidis (Beach).)

23. PSEUDOTHRIPS Hinds ('02, p. 146)
Key to the Species
a. Color yellow, thorax and abdomen tinged with orange; length
0.88 mm. ... ----............ : ...........---...-....---...................... -inequalis.
aa. Color hazel-brown; length 1.4 mm............................................spadix.

Bulletin 168, Thysanoptera of North America

105. Pseudothrips inequalis (Beach)
(Thrips inequalis Beach, '95, p. 223; redescribed by Hinds, '02,
p. 146, figs.)
Aster, black willow (Salix nigra), fringe tree (Chionanthus vir-
ginica), Senecio (Morgan, '13), wild begonia (Watson).
D. C., Md. (Hood, '17), Tenn., Ill., Ia., Fla.
106. Pseudothrips spadix Hood, ('16, p. 118).
"In a blue flower on a bush" (James Zetek).

24. TAENIOTHRIPS (Serv.) Karny
Taeniothrips s. str.
107. Taeniothrips inconsequens Uzel. The Pear Thrips.
(Euthrips pyri Daniel, '04; redescribed by Moulton, '07; ref.
Hood, '14d, p. 36.)
On deciduous fruits including almonds, apple, apricot, cherry,
fig, grape, peach, plum, pear, prune, English walnut, blossoms
of the wild plum (in England), Andromeda, Berberis, daisy,
dandelion, Douglas fir, Japanese flowering plum, skunk cab-
bage (Lysichiton), Viburnum. Breeds on Acer, Amelanchier,
Prunus nuttallia, Pyrus (Treherne).
Cal., B. C., N. Y., Pa., Md.

Subgenus PHYSOTHRIPS Karny ('09)
Key to the Species
a. General color white to light yellow or orange; head noticeably
wider than long.
b. Last two segments of the antennae long and slender, together
two-thirds as long as segment 6; wings shaded brown except
near the base and apex...--...............------ ------..........orchidi.
bb. Last two segments of the antennae not long and slender, to-
gether about half as long as segment 6.
c. Wings shaded brown -......---. --.. .................xanthius.
cc. Wings not shaded brown.
d. Ring vein and longitudinal veins conspicuous; wings
dilute yellow; spines and costa unusually long.
dd. Ring and longitudinal veins not conspicuous; wings
white ....... ----.............................. -- ........... ........ albus.
aa. General color brown to blackish brown.
b. Antennal segment 4 about 54 microns long--........--......- funestris.
bb. Fourth antennal segment much shorter.
c. Head nearly as long as wide.
cf. Mycterothrips longirostrum.
cc. Head noticeably wider than long.
d. Eyes not pilose; postocular bristles present; antennal
segments 3 and 4 not pedicellate; posterior longitud-
inal vein of fore wings with 13 spines............ehrhornii.
dd. Eyes sparsely pilose; postocular bristles absent; an-
tennal segments 3 and 4 pedicellate; posterior long-
itudinal vein with 11 or 12 spines.........................blacki.

Florida Agricultural Experiment Station

108. Taeniothrips (Physothrips) orchidi (Moulton).
(Frankliniella (Physothrips) orchidi (Moulton); Euthrips or-
chidi Moulton, '07, p. figs.)
Cal. in flowers of orchids; Washington, D. C., in greenhouse;
Belgium on Chamaedorea fragrans, Ficaria, and palms.
109. Taeniothrips (Physothrips) xanthius (Williams).
(Physothrips xanthius Williams, '17, p. 59, figs.)
On ordchids (Cattleya).
Trinidad, W. I.
110. Taeniothrips (Physothrips) costalis (Jones).
(Frankliniella (Physothrips) costalis (Jones) ; Euthrips costalis
Jones, '12, p. 13, figs.)
On California buckeye (Aesculus californica).
San Jose, Cal.
111. Taeniothrips (Physothrips) albus (Moulton).
(Frankliniella (Physothrips) albus (Moulton); Euthrips albus
Moulton, '11, p. 39, figs.)
On leaves of peach.
112. Taeniothrips (Physothrips) funestris (Hood).
(Physothrips funestris Hood, '15c, p. 24, figs.)
On an unidentified plant.
Brownsville, Texas.
113. Taeniothrips (Physothrips) ehrhornii (Moulton).
(Frankliniella (Physothrips) ehrhornii (Moulton); Euthrips
ehrhornii Moulton, '07, p. 54, figs.)
On grass and foliage of prune trees.
114. Taeniothrips (Physothrips) black (Watson).
(Frankliniella (Physothrips) black Watson, '19c.)
On Cal. poppy and dandelion.
25. PLESIOTHRIPS Hood ('15)
115. Plesiothrips perplexus (Beach).
(Thrips perplexus Beach, '95; redescribed by Hinds, '02, p.
184, figs.)
On sedge (Cyperus), corn, grass, cedar (Morgan, '13).
Mass., Md., Ill., Ia., Tenn., Fla. (Morgan, '13), Tex. (Hood, '17).
26. .THRIPS Linn
Key to the Species (Adapted from Jones, '12)
1. Head considerably wider than long.
a. Color dark brown, crescents bordering ocelli usually dark red to
orange-red or carmine.
b. Thorax and other parts orange tinted; body at least 1.2 mm.
c. Antennae and legs mostly dark, concolorous with the body.
d. Individuals large, 1.7 mm.; wings uniform dark brown
to brown -.........----............. ---------------- -magnus.

Bulletin 168, Thysanoptera of North America

dd. Much smaller, 1.25 mm.; wings light brown, lighter
area near base...........................------------------- madroni.
cc. Antennae mouse gray, legs yellow...............................-----impar.
bb. Thorax not orange tinted.
c. Thorax yellowish-brown; body length about 1 mm.
cc. Thorax blackish brown; tarsi and parts of all tibiae yel-
low; body length about 1.25 mm.......----.......................--varipes.
aa. Color dark blackish brown to black, with bright crimson hydo-
dermal pigment; antennal segments 3-7 pale lemon yellow.
aaa. Body color light yellow to light brown or brown.
b. Pterothorax lightly shaded with orange.. ..............winnemanae.
bb. Pterothorax not shaded with orange.
c. Inner crescents bordering ocelli light brown.
d. Ocelli subapproximate; posterior longitudinal vein of
fore wing with from about 14 to 17 regularly placed
spines .-.......................... ... .... --...--- ....... tabaci.
dd. Ocelli widely separated, anterior one on frona and
directed forward; posterior longitudinal vein with
about 7 spines-----............................. ---. abdominalis.
cc. Ocellar crescents carmine; wings grey, short..........aureus.
ccc. Ocellar crescents dark red; wings light brown.
d. Spines heavy; intermediate antennal segments elong-
ated ...............------...--... ......------ -------.spinosus.
dd. Spines short and weak; intermediate antennal seg-
ments moniliform ....................................... crenatus.
aaaa. Body color almost white, slight tinge of yellow............-.quinciensis.
2. Head about as long as wide; color light yellow shaded with brown.
a. Length 1.08 mm.; antennal segments 2-7 light brown; spines
light .............--..........--------- ..... ..............bremnerii.
aa. Length 1.4 mm.; antennal segments 3-7 brownish black to black;
spines stout ........... -....... .......---............--- actucae.
116. Thrips magnus Moulton ('11, p. 36).
On monkey flower (Mimulus sp.)
Visalia, Cal.
117. Thrips madroni Moulton ('07, p. 57, figs.).
Dandelion, Madrona, California lilac, California laurel.
Cal., Ore., Ky. (Morgan, '13).
118. Thrips impar Hood (15c, p. 25).
Md., in flowers of Impatiens; Ill., hibernating in moss.
Ga. (Watson, '22e).
119. Thrips helianthi Morgan ('13, p. 23, figs.).
On Helianthus sp.
120. Thrips varipes Hood ('13b, p. 161).
In flowers of Muscari racemosum and dog-tooth violet.
(Erythronium) in Md. (Hood, '17), and Clematis viorna, Ill.
121. Thrips pallicornis Hood ('12b, p. 138).
On the under side of hickory and apple leaves.

Florida Agricultural Experiment Station

122. Thrips winnemanae Hood ('13b, p. 166).
In flowers of water-leaf (Hydrophyllum virginicum).
123. Thrips tabaci Lindeman. (Redescribed by Hinds, '02, p. 179, figs.)
On a long list of host plants but especially onions and carna-
tions. The Onion Thrips.
Me. to B. C. to Fla. to Cal.; Bermuda, Eur., Palestine (Mor-
gan, '13).
124. Thrips abdominalis Crawford ('10b, p. 157, figs.). The Compositae
(T. femoralis Jones, '12, p. 4, figs.)
Common in the heads of most Compositae, Solanum, Saxifraga,
Daucus, onions.
Md., Va., Ill., Kan., Okla., Tex., Fla., Ga., Cuba, Mexico.
125. Thrips aureus Hood ('15c, p. 27).
On leaves of young plants of mayweed (Anthemis cotula).
126. Thrips spinosus Morgan ('13, p. 25, figs.).
Found abundantly in the blossoms of Magnolia grandiflora and
M. glauca (Apr. to June).
Quincy, Fla. (Morgan), Gainesville, Fla.
127. Thrips crenatus Watson ('22e, p. 35).
Rabun Co., Ga.
128. Thrips quinciensis Morgan ('13, p. 21, figs.).
On Pinkneya pubens.
Quincy, Fla., N. E. Ga.
129. Thrips bremnerii Moulton ('07, p. 59, figs.).
Inside of ripe figs.
San Jose, Cal.
130. Thrips lactucae Beach ('96, p. 224).
On wild lettuce.
Ames, Ia.
Ashmead in Insect Life, Vol. VII, p. 27 (Sept., 1894) describes Thrips
trifasciatus. If this is a valid species of thrips it may be recognized
by brown wings with three white bands and abdominal segments 3-6
Feeding on aleurodids, Utica, Miss.
Wing coloration and food habits would suggest Franklinothrips ves-
131. Baliothrips basilis Shull ('09, p. 224, figs.).
On leaves of millet grass (Milium efusum).

28. MICROTHRIPS Morgan ('13)
132. Microthrips pierce Morgan ('13, p. 19, figs.).
On cotton, pawpaw, Polymnia, Silphium, Vernonia.
Texas, Tenn., Va., Md.

Bulletin 168, Thysanoptera of North America

29. ODONTOTHRIPS Amyot et Serville
(Ref. Hood, '14, p. 36)
Key to the Species
a. Only basal fourth of fore wings white; only antennal segment
3 yellow .... ......... ... ...- ...- .....--- ............... .....ulicis californicus.
aa. Fore wings mostly white in basal and apical thirds.
b. Fore wings brown at extreme base, gray in' middle third,
and a gray spot at the extreme tip; antennal segments 3 and
4 yellow ... ...... ....................................- pictipennis.
bb. Middle and tip of fore wings light brown; only antennal seg-
ment 3 yellow, stalked, with a pseudo-joint near base.
133. Odontothrips ulcis californicus (Moulton).
(Euthrips ulcis californicus Moulton, '07, p. 53, figs.)
134. Odontothrips pictipennis Hood ('16, p. 117, figs.).
In flowers of Azalea nudiflora.
Great Falls, Va.
135. Odontothrips phaleratus (Haliday).
(Thrips phaleratus Haliday).
Quincy, Fla. on Plantago virginica (Morgan, '13, p. 1, figs., re-
described as Euthrips phaleratus (Haliday)).
Key to the Species
a. Color brown ................-..--...-..- -- -...-.. -----longirostrum.
aa. Color bright yellow................... -................floridana.
136. (?) Mycterothrips longirostrum (Jones).
(Euthrips longirostrum Jones, '12, p. 12, figs.)
On flowers of perennial lupine.
Los Gatos, Cal.
137. Mycterothrips floridana (Watson).
(Frankliniella floridana Watson, '18, p. 68).
On velvet beans (Stizilobium).
(Euthrips Targioni-Tozzetti)
Key to the Species
a. Color almost uniformly brown..............................grandioculus.
aa. Body yellow, more or less shaded with brown.
b. Abdomen yellow, only segments 1, 2, and 10 shaded with
brown ................----------.....- ..------- ---....----...obscurus.
bb. Abdomen uniform chestnut brown.
c. Antennal segment 3 longer and narrower than 1, 2, 4, or 5,
and as long as 6....................-- ..-....-----...cameroni.
cc. Antennal segment 3 shorter...........................secticornis.
aaa. Body very light yellow heavily tinged with orange on thorax.

Florida Agricultural Experiment Station

138. Anaphothrips grandioculus (Watson), (Euthrips grandioculus Wat-
son, 21, p. 36).
On grass.
Moore Haven, Fla.
139. Anaphothrips obscurus (Mull.). (Euthrips obscurus (Mull.); Ana-
phothrips striatus Osborn; redescribed by Hinds, '02, p. 160,
figs.;. Thrips obscurus Muller; Anaphothrips virgo Uzel; descrip-
tion of male, Schull, '09, p. 224). The Northern Grass Thrips.
On various grasses, corn, rye, alfalfa.
Me. and Ont. to Tenn, N. D., Neb., and Cal.; Eur., Aus.
140. Anaphothrips cameroni (Bagnall)
(Euthrips cameroni Bagnall, '19, p. 271.)
On injured wheat stems.
Semans, Sask.
141 Anaphothrips seticornis (Tryb.), (Euthrips seticornis (Tryb.).)
"Occurs in N. A.," Bagnall, '19, p. 272.
142. Anaphothrips arizonensis (Morgan), '13, p. 12, figs.
On snake weed.
Yuma, Ariz.

143. Aptinothrips rufus (Gmelin) var. rufus. (Redescribed by Hinds,
'02, p. 166, figs.; A. rufus var. connaticornis Uzel.)
On various grasses, clover.
Mass., N. Y., Mich., Ill., Neb., Md. (Hood, '17); Cal.; Eur.
144. Aptinothrips rufus var. rubus Bagnall.
N. A.; Eur.; India.
145. Oxythrips divisus Hood.
On Pinus virginiana.
Md., Va.
34. CHILOTHRIPS Hood ('16, p. 119)
146. Chilothrips pini Hood ('16, p. 120).
On twigs and leaves of Pinus virginiana.
Md., Va.

35. BREGMATOTHRIPS Hood ('12f, p. 66)
Key to the Species
a. Body not especially slender, 1 mm. long; head wider than long;
antenna segments 3-5 pale yellow, 6-8 brown..---.............venustus.
aa. Body slender, 1.2 mm. long; head about 1.1 times as long as broad;
antennal segments 3-5, apex of 2 and basal third of 6 lemon yel-
low ....................-- -- ....-...---- ---............. .... ............ gracilis.
147, Bregmatothrips venustus Hood ('12f, p. 67).
On grass.
Tenn. (Morgan, '13), Ill., Texas, Mexico.
148. Bregmatothrips gracilis Hood and Williams ('15, p. 122, figs.).
On grass.
Orlando, Fla.

Bulletin 168, Thysanoptera of North America

149. Rhaphidothrips fuscipennis Hinds ('02, p. 159, figs.).
On grasses.

37. DINUROTHRIPS Hood ('13e, p. 150)
150. Dinurothrips hookeri Hood ('13e, p. 151, figs.).
On Ipomoea.
Porto Rico.
Key to the Species
a. Head 1.25 times longer than wide; female without teeth or stout
spines on tibiae---........-..-- ........ -- -..............------........... morgani.
aa. Head 1.5 times wider than long; on the inner surface near the
apex of fore tibia a stout tooth, and on the hind tibia two
strong spines ......... ............. .......-.................. ................ fusciceps.
151. Merothrips morgani Hood (12b, p. 132, figs.; ref. '14, p. 17).
Under bark of dead willows and a shell-bark hickory, on branch
of post oak, among shells and debris in bird's nest, in a mush-
D. C., Md. (Hood, '17), Ill., Fla., Ky.
152. Merothrips fusciceps Hood and Williams ('15, p. 123, figs.).
On bamboo.
New Orleans, La.
39. EUPATHITHRIPS. Bagnall ('08, p. 23)
(Heterothrips Buffa, '08; Polyommatothrips Buffa, '09.)
Key to the Species
a. Antennal segment 3 markedly shorter than 4; distal half and
fifth of middle and hind tibiae respectively yellow.........silvestrii.
aa. Antennal segments 3 and 4 subequal; distal two-thirds and half
of middle and hind tibiae respectively yellow.....................affinis.
153. Eupathithrips silvestrii (Buffa).
(Heterothrips silvestra Buffa, '08, p. 124; Polyommatothrips sil-
vestri Buffa, '09, p. 164. Redescribed by Bagnall, '15, p. 501.)
On and in cracks of a dead Cacao tree (Urich).
Trinidad (Bagnall, '15, p. 501).
154. Eupathithrips affinis Bagnall ('15, p. 501, figs.).
From between leaf bases of an epiphytic bromelid.
Trinidad, W. I.

40. SEDULOTHRIPS Bagnall ('15, p. 503)
Key to the Species
a. Fore wings with a clear spot near the base, lighter distally; tube
lighter distally; prothoracic bristles short. Antennal segment 6
shorter than 7 and 8 together.
b. Ends of fore tibiae yellow; antennae yellow; eyes protruding
but little.-----...........-- ....-- .....--. --------.............................. vigilans.
bb. Legs uniform brown, no yellow color on legs or antennae

Florida Agricultural Experiment Station

(except in some cases on segment 3); eyes far protruding.
aa. Wings and tube uniformly brown; bristles on the posterior angles
half the length of the prothorax; antennal segments 6 longer
than 7 and 8 together........---........ .... ....................------- insolens.
155. Sedulothrips vigilans (Hood).
(Polyommatothrips vigilans Hood, '13c, p. 123, figs.)
Taken in sweepings.
156. Sedulothrips insolens Bagnall ('15, p. 503, figs.).
On and in cracks of dead Cocao tree.
Trinidad, W. I.
157. Sedulothrips hubbelli n. sp.
On Ficus sp.

Key to the Species
a. Body with white markings.
b. Many small white pigmental markings on body and legs.
bb. A narrow latero-dorsal white stripe on prothorax and white
stripes or blotches on abdomen.
c. Abdominal segments 1-7 with a narrow white stripe on
each side (m ale) ............... --....--------.........................vittatus.
cc. Segments 1-8 each with a white bloth on each side.
aa. Without white markings.
b. Smaller; body color light brown .............................floridensis.
bb. Body larger, 2 mm., body color dark brown...................drakei.
158. Phloeothrips maculatus Hood ('09c, p. 250, figs.).
Under rotting poplar bark.
Baldwin, Mich.
159. Phloeothrips vittatus Hood ('12c, p. 11).
On poplar.
Baldwin, Mich.
160. Phloeothrips ornatus Hood ('13 b, p. 165).
On bark of a dying red oak tree.
Washington, D. C.
161. Phloeothrips floridensis Watson ('13, p. 147, figs.).
Under dead bark of citrus tree, a fungus feeder.
162. Phloeothrips drake (Watson).
(Trichothrips drakei Watson.)
Under bark of black locust and in fungi.
N. Y., N. J.
Key to the Species
a. Thorax and abdominal segments 1, 3, 4, and 5 pale, bright yellow.

Bulletin 168, Thysanoptera of North America

aa. Whole body Liophloeothrips modestus.
163. Malacothrips zonatus Hinds ('02, p. 200, figs.).
In Turf.
Amherst, Mass.

43. HOPLANDROTHRIPS Hood ('12b, p. 145)
(Phloeothrips Haliday in part.)
Key to the Species
I. Vertex rounded, scarcely at all conical; dorsum with a pair of
knobbed bristles nearly as long as the postoculars.................microps.
II. Vertex conical; dorsum without long knobbed bristles in addition
to the postoculars.
A. Segment 3 of antennae longer than one and two together; body
color dark reddish brown; antennae light brown.
a. Head nearly 1.3 times as long as wide; antennae 1.3 as long as
head; segment 3 more than 1.5 times as long as 1 and 2 together.
aa. Head slightly more than 1.3 times as long as wide; antennae 1.5
times as long as head; segment 3 about 1.1 times as long as
segment 1 and 2 together............................ .......................... a miger.
B. Segment 3 of antennae shorter than one and two together;
a. Antennae mostly brown or with segment 3 and the bases of 4-6
b. General color yellowish brown, with considerable irregular
red hypodermal pigmentation; antennae twice as long as the
head or nearly so. Cheeks slightly arched.
bb. General color brown to blackish brown (abdomen largely
yellow in c, ee).
c. Cheeks with large spiniferous tubercles.
d. Pronotum strongly and closely reticulate; antennal
segments 3-6 yellow, shaded with brown apically.
dd. Pronotum less deeply reticulate; only pedicels of
antennal segments 3-6 yellowish.........................mcateei.
ddd. Pronotum smooth.
e. Antennal segments 3-7 uniformly light brown.
ee. Antennal segments 3-6 and part of abdomen more
or less yellow.
f. Antennae twice as long as the head; basal
half of segments 3 and 4 and basal third of
five yellowish, 6 to 8 brown; phrothorax .75
the length of head; postocular bristles as long
as the eye......................-----.............--- xanthopoides.
ff. Antennae 1.6 times as long as head; basal
portion of antennal segment 6 also brownish;

50 Florida Agricultural Experiment Station

prothorax little over half as long as head;
postocular bristles shorter than eye.
cf. xanthopus.
cc. Genal tubercles rather small or short.
d. No maroon pigment; tube .8 as long as head; antennal
segment 3 about 1.7 as long as wide
(cf. brunneicornis). uzeli.
dd. More or less maroon hypodermal pigment; tube not
over .6 as long as head (missing in brunneicornis).
e. Last antennal segment pedicellate; tube 2.8 as
long as basal width. Tibiae and tarsi yellow.
ee. Last antennal segment not pedicellate; tube not
over 2.3 as long as basal width (missing in brun-
neicornis) .
f. At least antennal segments 3-5 more or less
g. Antennal segments 3-6 yellow, only clouded
with brown, 3 twice as long as wide.
gg. Only basal .7 of 3, basal third of 4, and
pedicel of 5 yellow, segment 3 about 1.5
as long as wide.........................juniperinus.
ff. At most the base of three yellow.
g. Antennae uniformly blackish brown, 1.6
as long as head, segment 3 about 1.7 as
long as wide. Body length 1.4 mm.
gg. Antennae twice as long as head, segments
2 and 3 lighter brown, base of 3 yellow-
ish; 3 about 2.3 times as long as broad.
Body length 2 mm.....---.........brunneicornis.
aa. Antennal segments 1-6 clear yellow......----..............-- quercuspumilae.
165. Hoplandrothrips microps Hood ('12b, p. 150. figs.).
From gall on Quercus palustris, in dead branches of apple and
willow and old mines of scolytids; on hickory, hackberry, locust
and elm covered with trumpet creeper.
Ill., D. C., Va. (Hood, '17).
166. Hoplandrothrips jenneri (Jones).
(Phloeothrips jenneri Jones, '12, p. 21 figs.)
On peach foliage.
167. Hoplandrothrips armiger (Jones).
(Phloeothrips armiger Jones, '12, p. 23, figs.)
On laurel leaves.
San Jose, Cal.
168. Hoplandrothrips porgandei (Hinds).
(Phloeothrips pergandei Hinds, '02, p. 197, figs.).
On grass.
Mass., Tenn. (Morgan, '13), Fla.

Bulletin 168, Thysanoptera of North America

169. Hoplandrothrips russelli Hood ('15c, p. 36).
Tempe, Ariz.
170. Hoplandrothrips mcateei Hood ('15c, p. 38).
Taken from leaves of felled elder.
Oyster Bay, Wash.
171. Hoplandrothrips raptor (Crawford).
(Phloeothrips raptor Crawford, '10b, p. 159, figs.)
On shrubbery.
Guadalajara, Mexico; Fla. (Morgan, '13).
172. Hoplandrothrips xanthopoides Bagnall ('17, p. 22).
St. Vincent, W. I.;-Miami, Fla., on Moringa oleifera, Randia
tomentosa. Ziziphus mauritiana, Atalaya hemiglauca (Wat-
son, '23).
173. Hoplandrothrips xanthopus Hood ('12b, p. 145, figs.).
In dead leaves or under bark of maple, oak, willow, mullein,
in grass or on fox grape.
Ill. Pa., Md., Va. (Hood, '17);-Rabun Co., Ga.
174. Hoplandrothrips uzeli (Hinds).
(Phloeothrips uzeli Hinds, '02, p. 196, figs.)
Grasses, clover, elm, Yucca.
Mass., Tenn. (Morgan, '13).
175. Hoplandrothrips insolens Hood ('12b, p. 152. figs.).
On willow, sycamore and elms.
Ill., Md. (Hood, '17).
176. Hoplandrothrips juniperinus Hood ('12b, p. 146 figs.).
On dead branches of red cedar (Juniperuts virginiana).
177. Hoplandrothrips funebris Hood ('12b, p. 148).
Under loose bark of willow, oak, cottonwood.
Ill., Mo., Md., D. C., Va. (Hood, '17), Fla.
178. Hoplandrothrips bruneicornis Bagnall ('17, p. 23).
St. Vincent, W. I.
179. Hoplandrothrips quercuspumilae Watson ('20a, p. 19).
On "Oak runner" Quercus pumila.


(Hoplothrips Amyot et Serville)
Key to the Species
a. Body without white longitudinal bands.
b. Abdominal segments 3-8 with white blotches.....----............cortices.
bb. No white blotches on abdomen.
c. Head but gradually widened behind the eyes. Veins of
wings not very conspicuous.
d. Tube fully as long as the head............................beachi.
dd. Tube not over .85 as long as the head.
e. Head not produced beyond eyes. Segment 1 not
longer than 2. Tube not dark at base.........karnyi.
ee. Head produced beyond eyes. Segment 1 of an-

Florida Agricultural Experiment Station

tennae longer than 2 in dorsal aspect. Tube
darker at base.................. --..--................karnyi major.
cc. Head abruptly widened behind the eyes. Veins of the
wings conspicuous, black.............................magnafemoralis.
aa. Antennae black. Body with a white longitudinal band on each
side. -............. ---. -------..-. ... ........-----.....---.... ....albivittatus.
180 Acanthothrips cortices (DeGeer??) Hood (A. nodicornis Reuter;
Uzel, '95, p. 260, figs.; Psyche, Vol. 10, p. 222; Trichothrips am-
bitus Hinds, '02, p. 191, figs.; A. doanei Moulton, '07, p. 64; T.
copiosus Uzel.)
On grass, maples, poplar, willows, sycamores, oaks, elm, Poly-
Mass., Ct., N. Y., Va. (Hood, '17), Ill., Mich. (Hood, 12d desc.,
fig.). Cal., Eur.
181. Acanthothrips beach (Hinds).
(Trichothrips beach Hinds, '02, p. 192, figs.)
Under bark of dead willows and boards. (Ref. Hood, '14c, '17.)
Mass., D. C., Va., Mich., Ill.
182. Acanthothrips karnyi (Hood).
(Trichothrips karnyi Hood, '14, p. 20, '14c, p. 153.)
On dead trees, under bark, and in burrows.
Ill., Va., Md., N. J.
183. Acanthothrips karnyi major (Hood).
(Trichothrips karnyi major Hood, 14c, p. 153.)
184. Acanthothrips magnafemoralis Hinds ('02, p. 199, figs.).
Mass., Ill., Tenn. (Morgan, '13), Md., D. C., Va. (Hood, '17),
Fla., N. Y. (Adirondack Mts. Watson, '21b).
185. Acanthothri,ps albivittatus Hood ('08, p. 374).
(Hoplothrips albivittatus Hood, '12d, p. 143; '14c, p. 164.)
On Carolina poplar, oaks, apple.
Ill., D. C.

186. Neoeurhynchothrips cubensis n. sp.
Uriesia sp.

46. RHYNCHOTHRIPS Hood ('12b, p. 141)
Key to the Species
I. Dorsal surface not sculptured (head transversely striate), cheeks
a. Mouth cone excessively long and slender, reaching the middle of
the mesosternum; fore tarsus with a short, stout tooth.
aa. Mouth cone shorter.
b. Body length 1.5 mm.; prothorax longer than the head; at
least basal portions of antennal segments 1-6 ochreous.

Bulletin 168, Thysanoptera of North America 53

bb. Length 1.9 mm.; prothorax about as long as the head; an-
tennal segment 2 brownish yellow, and 3 yellowish brown,
others black............. ..............-----......--..................buffae.
bbb. Antennal segment 2 and base and apex of 3 yellowish.
2. Dorsal surface roughly sculptured; cheeks with several prominent
spiniferous tubercles..----......................---- ..---------------salicarius.
187. Rhynchothrips dentifer Hood ('12b, p. 143. figs.).
Under bark of poplar stump.
188. Rhynchothrips pruni Hood ('12b, p. 142, figs.).
On wild cherry (Prunus serotina), peach, sycamore.
Md., Tenn., Ill.
189. Rhynchothrips buffae (Hood).
(Trichothrips buffae Hood, '08, p. 369, figs.)
Minn. (Franklin, '09).
190. Rhynchothrips tridentatus (Shull).
(Trichothrips tridentatus Shull, '09, p. 226, fig. Refs. Hood, '12b,
p. 141; '12c, p. 159.)
On various species of oaks, on trillium (Hood, '17).
Mich., Ill., Mo., Md., D. C.
191. Rhynchothrips (?) salicarius Hood ('13b, p. 164, '17).
On young willow shoots.
Md., Va. (Hood, '17).
192. Liophloeothrips modestus (Bagnall).
(Malacothrips modestus Bagnall, '17.)
St. Vincent, W. I.
48,. LIOTHRIPS Uzel '95
Key to the Species
1. Head not over 1.33 times as long as wide.
a. Fore wings brownish at the extreme base; tube .8 or .9 as long
as the head.
b. Postocular and thoracic bristles blunt, .6 as long as the eye;
antennal segments blackish brown to black.....................ocellatus.
bb. Postocular and thoracic bristles sharp pointed and nearly or
quite as long as the eye.
c. Abdomen long and slender; antennal segments 4-7 cla-
vate, gradually tapering to a pedicel, 5 much smaller than
4; ocelli not so.
d. Color brown or black; length about 2 mm.; wings
long; prothorax .6 as long as head.....................caryae.
dd. Color brown to yellowish with much deep red hypo-
dermal pigment; length about 2.6 mm.; wings reach-
ing only about .75 the length of the abdomen; pro-
thorax .9 as long as head....................caryae floridensis.
cc. Abdomen short and thick; antennal segments 4-7 barrel-
shaped, abruptly contracted to a pedicel, 5 but little

Florida Agricultural Experiment Station

smaller than 4; anterior ocellus protruding beyond the
eyes and the bases of the antennae.........................bibbyi,
aa. Fore wings yellow *at extreme base; tube but little over .5 as
long as head; body and antennae dark brown.......................fuscus.
aaa. Fore wings shaded in basal half.
b. Head about 1.3 as long as wide; postocular bristles much
shorter than the eye; tube .6 as long as the head.
c. Fore wings nearly black in the basal half; antennal seg-
ments 3, 4, and base of 5 yellow-----.........................umbripennis.
ce. Fore wings light brown in basal half; only antennal seg-
ment 3 and base of 4 yellow.-.......umbripennis mexicanus.
bb. Head about 1.2 as long as wide; postocular bristles blunt,
as long as the eyes; antennal segment 3 only clear orange-
yellow........--................-----------.....------ .............---ontanui.
aaaa. Fore wings with a median brownish streak or cloud.
b. Median brownish streak not extending beyond the middle;
tube not over .8 as long as the head.
c. The brownish streak in the basal half of wings, antennal
segments 3, and 4 are yellow; knees not white.
d. Wing with 14 interlocated hairs; antennal segment
5 yellow at the base......------..............---...........-- castanea.
dd. Fore wing with 8 or 9 interlocated hairs; pedicals of
antennal segments 5-7 pale gray........................-sambuci.
cc. The brownish streak in the basal third very faint; 12
interlocated hairs on wing; antennal segments 1-3 yellow;
apices of all femora white on under side........ leucogonis.
bb. Median brown area extending to near the apex, fore wing
also margined with a slight shading of brown; only antennal
.segment 3 yellow; tube .9 as long as the head.....-...varicornis.
aaaaa. Fore wings uniform light brown.
b. All tarsi, tips of fore tibiae, and antennal segments 3 and 4
shading to yellow.--....-.....----..........--- ... ..................--ilex.
bb. All tarsi gray brown to brown; antennae brown with only
base of segment 3 yellow-----..............- ..............ilex dumosa.
2. Head about 1.4 times as long as wide or longer.
a. Antennae lemon yellow...............------- -......... .. ...... ...........citricornis.
aa. Only antennal segment 3 wholly yellow.
b. Cheeks with collar-like widening at base; antennal segment
4 nearly black. Panama--..........---...............-.... ....-zeteki.
bb. Cheeks abruptly contracted at base; antennal segment 4 yel-
low, only shaded with brown.
c. Antennal segment 4 much shorter than 3, brown shading
considerable, 5 brown. Md. Ga.........................brevicornis.
cc. Antennal segment 4 nearly as long as 3, brown shading
little, 5 yellow in basal half. Honduras.................perseae.
193. Liothrips ocellatus Hood ('08, p. 375; '09, p. 249).
In moss and in galls on black walnut.
Ill., Va. (Morgan, '13).

Bulletin 168, Thysanoptera of North America

194. Liothrips caryae (Fitch).
(Phloeothrips caryae Fitch, '56; redescribed by Hood, '14 c, p.
160, figs.)
In Phylloxera galls on hickory.
N. Y., Md. (Hood, '17), Ill., La., Ia.
195. Liothrips caryae floridensis Watson ('16, p. 130, figs.).
In galls of Phylloxera on hickory, on the walls of which the
larvae feed during May and June.
196. Liothrips bibbyi n. sp.
Sphaeralcea cuspidata.
Durango, Mexico.
197. Liothrips fuscus (Morgan) (Hood, '18).
(Trichothrips fuscus Morgan, '13, p. 30, figs.)
Swept from spice bush.
Quincy, Fla.
198. Liothrips umbripennis (Hood).
(Phyllothrips umbripennis Hood, '09, p. 30, fig.)
On oak.
Ill., Mich.
199. Liothrips mexicanus Crawford (Ref. Hood, '18, p. 132).
(Liothrips umbripennis mexicanus Crawford, '10b, p. 161.)
"Taken in oak galls at an elevation of 10,000 ft." Guadalajara,
200. Liothrips montanus Hood ('13b, p. 163).
On currants and gooseberries.
Bozeman, Mont.
(Ref. Cooley, Mont., Bul. 98 and 12th Annual Rep., Mont., 1914).
201. Liothrips castanea Hood ('15e,p. 76).
On chestnut leaves.
Ct., Md., Va. (Hood).
202. Liothrips sambuci Hood ('13b, p. 163).
On elder (Sambucus canadensis L).
203. Liothrips leucogonis Hood (15e, p. 78).
On Ostrya virginiana, oak.
204. Liothrips varicornis Hood ('12f, p. 74, figs.).
Sweepings from weeds and grass.
Monterery, Mexico.
205. Liothrips ilex (Moulton) (Hood, '18).
(Trichothrips ilex Moulton, '07, p. 62, figs.)
On Christmas berry (feteromeles arbutifolia).
Coast region of California.
206. Liothrips ilex dumosa (Moulton) (Hood, '18).
(Trichothrips ilex dumosa Moulton, '07, p. 63).
Scrub oak (Quercus dumosa).
Santa Clara Co., Cal.

Florida Agricultural Experiment Station

207. Liothrips citricornis (Hood).
(Phyllothrips citricornis Hood, '08b, p. 305, figs.; L. flavoanten-
nis Watson, '16.)
On hickory leaves, wild grape Cornus florida, Viburnum, oak,
bass-wood, (Tilia americana.)
Pa., Md., D. C., Va. (Hood, '17), Tenn. (Morgan, '13), Ill., Mich.,
Ga., Fla.
208. Liothrips zeteki Hood ('13c, p. 120, figs.).
In sweepings.
Panama, Honduras (T. B. Hubbell, Coll.).
209. Liothrips brevicornis Hood ('13b, p. 164).
On leaves of sassafras.
N. J. (Hood, '17), Va.;-Chevy Chase, Md. (W. B. Wood, Coll.).
210. Liothrips perseae n. sp. P. 80.
Avocado (Persea sp.)

49. LISSOTHRIPS Hood ('08)

211. Lissothrips muscorum Hood ('08, p. 265).
In moss.
Ia., Ill., Mich., Md., D. C. (Hood, '17).

50. NEOTHRIPS Hood ('08)

212. Neothrips corticis Hood ('08, p. 372, figs.; ref. Hood, '17).
Under bark in winter.
Ill., Mich., Md., Va., D. C.

51. GNOPHOTHRIPS Hood and Williams ('15, p. 133)

213. Gnophothrips megaceps Hood and Williams ('15, p. 133, figs.).
From a tree stump.
Emeralda, Fla.

52. CEPHALOTHRIPS Uzel ('95)
Key to the Species

a. Only antennal segment 3 light brown, others dark .............errans.
aa. Antennal segments 3-5 yellowish brown.... ....,.... monilicornis.
214. Cephalothrips errans Moulton ('11, p. 43, figs.).
On wild mustard, apricot, and prune foliage.
San Jose, Cal.
215. Cephalothrips monilicornis Reuter.
Shaken from tall rye grass (Treherne).
Vernon, B. C. (Treherne); Eur.

53. BAGNELLIELLA Karny ('20b, p. 41; '21c, p. 33)

216. Bagnelliella yuccae (Hinds).
(Cephalothrips yuccae Hinds, '02.)
In blossoms of yucca.
Texas, Fla., Tenn. (Morgan, '13, p. 45), Mass., D. C., Md. (Hood,
'17), Barbados (Franklin, '08).

Bulletin 168, Thysanoptera of North America

54. OEDALEOTHRIPS Hood ('16d, p. 64)
Key to the Species

a. Tube yellow, white blotches on abdominal segments 2, 5, and 6;
antennal segment 3 orange brown in basal half; antennal seg-
ment 2 nearly .8 as long as 4............. ........................hookeri.
aa. Tube black, white blotches on abdominal segments 2, 4, and 5;
antennal segment 3 uniform dark brown; antennal segment 2 half
as long as 4........................-.......-. ... ..--- ------- ... ......-....... querci.
217. Oedaleothrips hookeri Hood ('16c, p. 64, figs.).
On Bermuda grass.
Dallis, Tex.
218. Oedaleothrips querci (Watson).
(Myrmecothrips querci Watson, '20b, p. 20).
On "oak runner" (Quercus pumila).

55. WATSONIELLA Karny ('23)
(Dolicothrips Watson, '20b, p. 21.)
219. Watsoniella elongata (Watson).
(Cephalothrips elongata Watson, '19b, p. 2; Dolicothrips elongata
Watson, '20b, p. 21.)
On a barnacle scale (Cerroplastes cerripediformis).
Miami, Fla.

56. HINDSIANA Karny ('21)
Key to the Species
a. Head but little longer than wide.
b. Cheeks but slightly arched, mouth cone scarcely reaching mid-
dle of prosternum; body length 1.5 mm.; antennal segment 7
but little shorter than 4; tube .6 as long as head, and less than
twice the basal width..................................... .... ..... catchingsi.
bb. Cheeks pronouncedly arched; mouth cone reaching past mid-
dle of prosternum; body length 1.1 mm.; antennal segment 7
much shorter than 4; tube .7 as long as head and more than
twice as long as width at the base.......-........................pini.
aa. Head nearly 1.5 times as long as wide; mouth cone barely or not
reaching the middle of the prosternum; cheeks but little arched.
b. Antennal segment 7 longer than 4, and 3 is the longest; length
of the tube only half that of the head and less than twice the
basal width; body length 1.5 mm........................ .......melaleuca.
bb. Antennal segment 7 shorter than 4, tube .6 as long as the
head, and twice as long as basal width; body length 1.2 mm.
220. Hindsiani catchingsi n. sp.
On lemon in association with (Chrysomphalus aonidam).
221. Hindsiana pini Watson ('22b, p. 65).
Long leaf pine.
Blanton, Fla.

Florida Agricultural Experiment Station

222. Hindsiana melaleuca Bagnall.
(Zygothrips bicolor Hood and Williams, '15, p. 126, figs.)
Spanish moss, bamboo, rushes, (?) Mimosa.
Fla., W. I.
223. Hindsiana cocois Watson ('22c, p. 66).
Under cap scales of cocoanuts, on mango.
Miami and Oneco, Fla., Cuba.
(It is possible that these last two are but one variable species.)

57. HAPLOTHRIPS Amyot et Serville, 1843 (Anthothrips)
Key to the Species
I. Eyes produced posteriorly on the ventral side; wings of normal length
but scarcely narrowed in middle, fringe sparse.
A. Head faintly sculptured; no interlocated hairs on the fore wings;
tibiae brow n -........... ..... ............... ................... ..................bellus.
B. Head almost free of sculpture; 3 or 4 interlocated hairs; Tibiae
pale yellow .......... .... ----.. ..................tibialis.
II. Eyes not produced posteriorly; fore wings narrowed in middle.
A. Postocular bristles small or wanting; body large, with much
red hypodermal pigment........--........--............leucanthemi (statices).
B. Postocular bristles well developed; body with little or no red
hypodermal pigment (except gowdeyi and dozieri).
a. Postocular bristles and most of those of the thorax knobbed.
b. Cheeks set with minute bristles, surface roughened; fore
tarsus with a large tooth; 10 to 12 interlocated hairs on
the fore wings.
c. Only base of antennal segment 3 yellow....... flavipes.
cc. Antennal segments 3-5 yellow ....... ...............--- rabuni.
bb. Cheeks with few inconspicuous bristles.
c. Wings only about half as long as the abdomen.
d. Fore wings without interlocated hairs .....gracili;.
dd. Fore wings with 4 interlocated hairs ...........oneco.
cc. Wings normal length, with 4-7 interlocated bristles.
d. Postocular bristles short; antennal segments 3-6
yellow -......................... ...... ....-- .. dozieri.
dd. Postocular bristles long.
e. Lighter brown; fore femora but little enlarged;
head about as wide as long.
f. With much red hypodermal pigment.
ff. Brown, without red hypodermal pigment.
ee. Brown without red pigment; head longer than
wide; fore femora considerably enlarged.
f. Body almost uniform chestnut brown.
ff. Body dark brown.
g. Tibiae bright yellow....................funki.
gg. Tibiae brown, often shaded with yel-

Bulletin 168, Thysanoptera of North America 59

h. All tibiae light yellowish brown;
body dark brown..............cubensis.
hh. Tibiae dark brown, only fore with
some yellow .........................harnedi.
aa. Postocular bristles not knobbed.
b. Apex of femora with small anteriorly directed tooth
c. Antennae uniformly dark brown; terminal bristles
shorter than the tube. ......... ............................ jonesi.
cc. Antennal segment 3 brownish yellow; terminal bris-
tles longer than the tube..................................halophilus.
bb. Apex of femora toothless.
c. Wings clear except a brownish area at the base.
d. Antennae twice as long as the head, usual sense
cones on segment 3.--................................malifloris.
dd. Antennae less than twice the length of head.
e. No sense cone on the inner surface of seg-
ment 3.
f. Prothorax less than twice as wide as long.
g. Only antennal segment 3 entirely yel-
low or brownish yellow.
h. Antennal segment 3 shorter than 2.
hh. Antennal segment 3 longer than
2 .......................... ......... .. .. pini.
ff. Prothorax nearly or quite twice as wide
as long.
g. Antennal segments 3-6 yellow, 3 long-
er than 2; tube two-thirds as long as
head ...... ......................... .......... faurei.
gg. Only antennal segment 3 yellow, short-
er than 2; tube about half as long as
head ............... ............. .. humilis.
ggg. Segment 3 light brown, others dark.
ee. Sense cones present on segment 3.
f. Body short and thick, brown; head about
as wide as long................... .... ..... ... querci.
ff. Body long and slender, black; head a third
longer than wide.................angustipennis.
cc. Wings clouded with gray with a nearly black area at
the base and a paler one just before the middle, 2
interlocated hairs -..................................nubilipennis.
224. Haplothrips leucanthemi (Schrank).
(Thrips leucanthemi Schrank, 1781; Haplothrips statices Hal;
Anthothrips niger (Osborn); ref. Hinds, '02, p. 188, figs.;
Phloeothrips nigra Osborn, '83, p. 154.)
Most common on grasses but also on apple, plum, Spirea discolor
(Treherne, '19), tomatoes, Plantago virginica, Achillea mille-
folium, Rudbeckia, rutabaga, corn.
All U. S., B. C.; Europe.

Florida Agricultural Experiment Station

225. Haplothrips flavipes (Jones).
(Anthothrips flavipes Jones, '12, p. 18, figs.)
San Jose, Cal.
From an "emergence cage for pear thrips."
226. Haplothrips rabuni Watson ('22, p. 37).
Grass and sedges.
227. Haplothrips (?) bellus Hood and Williams ('15, p. 125, figs.).
On grasses and rushes.
228. Haplothrips (?) tibialis Hood, '14b, p. 39, figs.
On sugar cane.
Porto Rico.
229. Haplothrips gracilis Watson, '20b, p. 18.
On ironweed (Vernonia).
230. Haplothrips oneco Watson.
On mango.
Oneco, Fla.
231. Haplothrips dozieri Watson.
(Anthothrips dozieri Watson, '18, p. 71.)
On rose, Eupatoriuem serotinum, Ostrya virginiana; tea blos-
232. Haplothrips gowdeyi (Franklin).
(Anthothrips gowdeyi Franklin, '08, p. 724, figs.; Anthothrips
variablis Crawford, '10b, p. 166 figs.)
Celosia, dodder, Melanthera deltoidea, tobacco seed, Agromyza
galls in tomato leaves; blossoms of Bidens.
Mexico, Nicaragua, S. Fla., Barbados, Cuba, Porto Rico (Hood,
'13e), Australia (Hood, '18), St. Vincent (Bagnall, '17).
233. Haplothrips merrilli Watson,('20b, p.).
Under scales of the caps of cocoanuts.
Cuba, S. Fla.
234. Haplothrips citri (Watson).
(Cryptothrips citri Watson, '16.)
Under bark of citrus tree with gummosis.
Fruitland Park, Fla.
235. Haplothrips funki Watson ('20b, p. 23).
Under bark of oak trees.
Orlando, Fla.
236. Haplothrips cubensis n. sp.
Under cap scales of cocoanuts from Cuba.
237. Haplothrips harnedi Watson ('22f, p. 45).
On citrus trees.
238. Haplothrips jonesi Karny.
(Anthothrips nigricornis Jones, '12, p. 17, figs.)
On Eriogonun nudum.
San Jose, Cal.

Bulletin 168, Thysanoptera of North America

239. Haplothrips halophilus Hood ('15c, p. 29).
In heads of Scirpus paludosus.
240. Haplothrips malifloris Hood ('16, p. 121).
In blossoms of apple.
Roswell, N. M.
241. Haplothrips graminis Hood ('12c, p. 69).
(Anthothrips floridensis Watson, W, '16, p. 128.)
Very common thruout southern U. S. on grasses.
Ia. to Fla.
242. Haplothrips pini (Wats.).
(Cryptothrips pini Watson, '15, p. 49 figs.)
Among needles of pines.
243. Haplothrips faurei Hood ('14c, p. 157, figs.).
On ivy and willow leaves, predaceous on mites.
N. Y.
244. Haplothrips humilis Hood ('14c, p. 158, figs.).
In blossoms of compositae.
Panama, Ft. Myers, Fla.
245. Haplothrips ruber (Moulton) (Ref. Hood, '18, p. 127).
(Trichothrips rubber Moulton, '11, p. 42, figs.)
On blossoms of Azalea.
Sari Jose, Cal.
246. Haplothrips querci Watson ('20b, p. 18).
On scrub oaks.
Daytona, Fla.
247. Haplothrips angustipennis Watson ('22, p. 38).
248. Haplothrips nubilipennis Hood ('14c, p. 156, figs.).
Under bark of white oak trees.
Baldwin, Mich.

249. Neoheegeria verbasci (Osb.). The Mullein Thrips.
fHaplothrips verbasci (Osb.); Anthothrips verbasci (Osborn);
redescribed by Hinds, '02, p. 189, figs. Phloeothrips verbasci
Osborn; Trichothrips femoralis Moulton, '07, p. 119; Ref. Hood,
'18). Common on mullein (Verbascum sp.) corn in Fla. (Mor-
gan, '13, p. 45.)
Mass., Pa., Md., Ind., Ill., Mich., Ia., Ga.;-Ohio (C. J. Drake),
Miss. (H. L. Dozier).

Key to'the Species
a. Thoracic bristles very small with acute tips, no postoculars; fore-
femora thickened, color brown, body short and thick.
aa. Thoracic bristles blunt or capitate.
b. Body color lemon yellow............................................... pallidus.

Florida Agricultural Experiment Station

bb. Color black or brown.
c. Femora only moderately if at all thickened.
d. Color black; head 1.4 as long as wide ........- longiceps.
dd. Color light brown with dark hypodermal pigment;
head not over 1.3 as long as wide.
e. Antennal segment 3 much the longest, hypodermal
pigment purple ---.....................- ---..-- ----floridensis.
ee. Antennal segment 4 longest, hypodermal pigment
black .................................. ...- .... ..----- cassiae.
ddd. Brown; hypodermal pigment red or orange if any.
e. Dark brown; head 1.3 times as long as wide;
antennal segment 4 longest; prothorax longer than
width of head; tarsal tooth with two long spines
at base; terminal bristles twice as long as tube.
ee. Light brown; head 1.1 as long as wide; antenna
segment 5 longer than 4; prothorax shorter than
width of head; tarsal tooth not spined; terminal
bristles shorter .......-....... ........----------americanus.
cc. All femora somewhat thickened, the fore noticeably so;
Antennal segment 8 not broadly united to 7, subconical,
slender, nearly three times as long as wide ...............harti.
250. Zygothrips wyomingensis n. sp. p. 82.
On wild flowers.
251. Zygothrips pallidus Hood ('12b, p. 140, figs.).
Bermuda grass.
So. Texas.
252. Zygothrips longiceps Hood ('08, p. 364, figs.).
In a gall on golden-rod (Solidago sp.).
253. Zygothrips floridensis Watson ('22d, p. 21).
On unknown shrub.
Elfers, Fla.
254. Zygothrips cassiae (Watson).
(Haplothrips cassiae Watson.)
On cassia sp.
Daytona, Fla.
255. Zygothrips pullus Hood and Williams ('15, p. 127, figs.).
On bamboo, sago palm, live oak with Spanish moss.
New Orleans, La.
256. Zygothrips americana Hood ('12, p. 114, figs.).
(Z. minutus Hood, '08 nec Uzel.)
Under loose bark of trees.
Md., Va., D. C. (Hood, '17), Ill., Mo., Neb., Mich.
257. Zygothrips harti Hood ('13, p. 162).
(Z. femoralis Morgan, '13, p. 40, figs.)
In sweepings, on artichoke, under dead bark, on sumach and
Md., Va., Tenn., Ill., Texas.

Bulletin 168, Thysanoptera of North America

60. CRANIOTHRIPS Bagnall ('15)
258. Craniothrips urichi Bagnall ('15, p. 504).
On leaves of Inga sp.
Trinidad, W. I.

259. Podothrips semiflavus Hood ('13d, p. t8).
On sugar cane; Para grass (Panicum barbinode).
Porto Rico, Cuba, Virgin Is. (C. E. Wilson).

62. SCOPAEOTHRIPS Hood ('12 f.)
260. Scopaeothrips unicolor Hood ('12 f.).
On Opuntia.
Brownsville, Tex.

63. RHOPALOTHRIPS Hood ('12 f.)
261. Rhopalothrips bicolor Hood ('12 f.).
On Opuntia.
Monterery, Mexico.

64. EURYTHRIPS Hinds ('02)
Key to the Species
a. Mouth cone short and blunt; spines of the body blunt.
b. Width of the abdomen about 1.7 that of the prothorax; an-
tennae twice as long as the head ......................- ampliventris.
bb. Abdomen about 1.25 times as wide as prothorax; anten-
nae about 2.5 times as long as the head............--........-...osborni
aa. Mouth cone sharp-pointed at the tip; spines of the body acute.
b. Mouth cone reaching only middle of prosternum ...........hindsi.
bb. Mouth cone reaching across the prosternum.--.......longilabris.
262. Eurythrips ampliventalis Hinds ('02, p. 202, figs.).
Amherst, Mass., taken in turf in the fall; Tenn., hibernating in
stools of broom sedge (Morgan, '13).
263. Eurythrips osborni Hinds ('02, p. 203, figs.).
On grasses, Amherst, Mass., Tenn. (Morgan, '13).
264. Eurythrips hindsi Morgan ('13, p. 27, figs.).
Taken in stool of broom sedge.
265. Eurythrips longilabris Watson ('20b, p. 36).
At light.
65. PLECTROTHRIPS Hood ('08, p. 370)
Key to the Species
a. Only tibiae and tarsi yellowish brown; fore tibia with a stout
obtuse tooth on inner margin of apex; only antennal segment 2
orange at base; terminal bristles nearly twice as long as the
tube ----.... --... ------.. ------....---.----................................. antennatus.
aa. Legs uniform orange yellow; no tooth on fore tibia; antennal
segments 2 and 3 orange yellow; terminal bristles 1.3 times as
long as tub .........- -............. ....................... ................-. pallipes.

Florida Agricultural Experiment Station

266. Plectrothrips antennatus Hood ('08, p. 370).
Taken on the window of a woodshed in June.
Urbana, Ill.
267. Plectrothrips pallipes Hood ('16c, p. 78).
In burrows of a cerambycid on pimentos.
Key to the Species
a. Eyes very small; ocelli and wings wanting.
b. Last two antennal segments completely united; body length
1.5 mm. .-........--....-----....-- ...-------------...--- --.-...anomocerus.
bb. Last two antennal segments not completely united.
c. Body grayish yellow, length 1.3 mm..........-.....semicaecus.
cc. Body brown to yellow-brown, length about 1 mm.
d. Lateral profile of eyes showing about three facets;
first antennal segment about half as long as second.
dd. Eyes small but normal; first antennal segment nearly
as long as second. Abdominal segments 9 and 10
and all tarsi yellow ..----......................flaviacauda.
aa. Eyes normal; ocelli usually present.
b. Most prominent bristles of the body with blunt or dilated tips.
c. Each fore tarsus armed with a tooth.
d. Body length 2 mm. or more, fore wings broadened in
apical .4 ............... ............ ------------- am plipennis.
dd. Body length 1.7 mm. or less; antennae about 1.7
times as long as the Head.
e. Postocular bristles short and inconspicuous-....dens.
ee. Postoculars prominent.
f. Postoculars acute; body black, antennae brown.
ff. Postoculars knobbed at the tip -... angusticeps.
cc. Fore tarsi unarmed.
d. Tube fully as long as the head; tibiae, tarsi, and inter-
mediate antennal segments bright lemon yellow; body
length 1.8 mm......-..........-- ----- --..---------l.ongitubus.
dd. Tube .8 as long as the head; only antennal segments
1 and 2 yellow; legs brown; body length 1.6 mm.
bb. Prominent spines on the body acute; rather large, 1.2 mm. or
c. At least each fore tarsus armed with a tooth.
d. Body length about 1.7 mm.; fore tarsal tooth small,
acute; wings light gray-brown, spotted with lighter.
dd. Fore tarsus with a large tooth.
e. Fore tarsal tooth straight; body and legs brown-
ish yellow ........--..... ..........- .--- -------...marginalis.
ee. Tarsal tooth slightly curved; head, apical abdominal
segments, and most of legs yellow --.......terminalis.

Bulletin 168, Thysanoptera of North America

cc. Tarsi unarmed.
d. Color ochraceous yellow-...................................zonatus.
dd. Color blackish brown........................------.............f uscicornis.
268. Trichothrips anomocerus Hood ('12d, p. 137).
Under bark of sycamore and grape.
Md., Va. (Hood, '17).
269. Trichothrips semicaecus Uzel ('95, p. 249).
Under dead willow bark.
D. C. (Hood, '14c); England, Czecho-Slovakia.
270. Trichothrips smithii Hood ('09, p. 29, figs.).
On sugar maple (Acer saccarum).
271. Trichothrips flavicauda Morgan (213, p. 28, figs.; Ref. Hood, '14, p.
19, figs.).
Under bark of dead willow and on a dead branch of pawpaw.
Ky., Va., Md. (Hood, '17).
272. Trichothrips amplipennis Morgan ('13, p. 33, figs.).
On Hypericum dolabriforme.
Quincy, Fla.
273 Trichothrips dens Moulton ('07, p. 60, figs.).
On apricot foliage.
Santa Clara Valley, Cal.
274. Trichothrips brevicuralis Shull ('09, p. 227, fig.).
Among leaves of pine-cone gall on willow.
Huron Co., Mich.
275. Trichothrips angusticeps Hood ('08, p. 367, figs.).
Under bark of rotten stump.
Pa., Md., Va. (Hood, '17), Ill.
276. Trichothrips longitubus Hood ('08, p. 368).
Taken in sweeping vegetation.
Carbondale, Ill.
277. Trichothrips hoodi Morgan ('13, p. 31, figs.).
On leaf of Paulonia imperialis.
Clarksville, Tenn.
278. Trichothrips americanus Hood ('08, p. 366, figs.).
Under bark of rotten stump.
Ill., Mich. (Hood, '14c, p. 154).
279. Trichothrips marginalis Hood and Willliams ('15, p. 128, figs.).
Under bark of willow tree.
280. Trichothrips terminalis Hood and Williams ('15, p. 130, figs.).
From the stump of a tree.
Orlando, Fla.
281. Trichothrips zonatus Hood ('14c, p. 154, fig.).
282. Trichotnrips fuscicornis Hood ('16, p. 122.).

Florida Agricultural Experiment Station

67. BARYTHRIPS Hood and Williams ('15, p. 134)
Key to the Species
a. Head longer than broad, bristles at posterior angles of prothorax
and postoculars long and pointed.............:....-............sculpticauda.
aa. Head about as broad as long; bristles of posterior angles not es-
pecially long, capitate; postoculars minute...................brevitubus.
283. Barythrips sculticauda Hood and Williams ('15, p. 135, "figs.).
From a pine stump.
Orlando, Fla.
284. Barythrips brevitubus (Watson).
(Trichothrips brevitubus Watson.)
Oaks and Citrus.
Gainesville, Elfers, Orlando, Fla.
(The generic description of Barythrips which was founded on
a single male will have to be modified in some minor characteristic
to admit this species.)

68. GLYPTOTHRIPS Hood ('12, p. 116)
285. Glyptothrips flavescens (Hood).
(Pactothrips flavescens Hood, '12, p. 116, figs.; '14c, p. 159 male.)
In sod.
N. Y., Ill.

69. SYMPHYOTHRIPS Hood and Williams ('15)
286. Symphyothrips punctatus Hood and Williams ('15, p. 131, figs.).
"In an orange tree";-under scale-infested caps of cocoanuts, on
a mango tree infested with scales. Apparently predaceous.
Orlando and Oneco, Fla.; Cuba; Miami, Fla.

70. ALLOTHRIPS Hood ('08)
287. Allothrips megacephalus Hood ('08, p. 372, figs., male Shull, '09, p.
Taken from under bark of various trees.
Urbana and Springfield, Ill.; Tenn. (Morgan).
71. ALEURODOTHRIPS Franklin ('09, p. 228)
288. Aleurodothrips fasciapennis Franklin ('09, p. 229, figs.).
(Cryptothrips fasciapennis Franklin, '08, p. 727, figs.)
Feeds on aleurodids and crawlers .of scale insects.
Fla., Cuba, Barbados, La.; Nassau, W. I. (U. C. Zeluff, Coll.),
Venezuela (Cogswell and Kennedy of Federal Hort. Bd. Colls.).

72. GASTROTHRIPS Hood ('12b, p. 156; Ref. Hood '13, p. 35)
Key to the Species
a. Body length about 1.4 mm.
b. Head wider than long; fore tarsi unarmed; tube shorter than
the head, brownish red with black tip,.................-..ruficauda.
bb. Head about as wide as long; fore tarsus with a long, curved
tooth; tube as long as the head, black.........................texanus.
aa. Body length 2.8 mm........................... ........ ............salicis.
289. Gastrothrips ruficauda Hood ('12b, p. 156, figs.; Morgan, '13, p. 35,

Bulletin 168, Thysanoptera of North America

Under bark and on branches of grape, sycamore, willow and
Viburnum, Quercus lyrata.
Ill., Va. (Morgan, '13), Md. (Hood, '17).
290. Gastrothrips texanus Hood ('12b, p. 157, figs.).
On huisache (Acacia farnesiana).
Brownsville, Tex.
291. Gastrothrips salicis (Watson).
(Trichothrips salicis Watson, '21, p. 80.)
On willow.
Cranberry Lake, N. Y.

73. TREHERNIELLA gen. nov.
292. Treherniella orlando (Wats. and Osb.).
(Haplothrips orlando Wats. and Osb.)
On scrub oaks.

Key to the Species
a. Color uniform black (males only described).
b. Antennae more than twice as long as the head and inserted
beneath the vertex; tooth of fore tarsus about half as long
as the eye; abdomen wider than the prothorax, tube longer
than the head ...............----........--- ............-----.. ---.............. harti.
bb. Antennae shorter, not inserted beneath the vertex; tooth of
fore tarsus nearly as long as the eye; abdomen narrower than
the prothorax, tube shorter than the head....................longipes.
aa. Antennal segments 1-3 yellow............................................picticornis.
293. Diceratothrips harti Hood (12c, p. 12).
Sweeping grass.
Brownsville, Texas.
294. Diceratothrips longipes Hood ('12c, p. 14).
On Acacia farnesiana, Willd.
Brownsville, Texas.
295. Diceratothrips picticornis Hood ('14c, p. 166, fig.).
In galls in fruit of Eugenia.
Cuba, Panama.

75. DICHAETOTHRIPS Hood ('14c, p. 164)
296. Dichaetothrips williamsi Karny ('20, p. 92, figs.).

76. HOLOPOTHRIPS Hood ('14f, p. 49)
Key to the Species
a. Antennal segments 3-6, fore tibiae, tarsi, and abdominal segments
1-3 nearly clear white-- ---- ---..-......... -....--..........-- ......------- signatus.
aa. Entire insect nearly uniform dark blackish brown.......-............tenuis.
297. Holopothrips signatus Hood ('14f, p. 50, figs.).
On leaves of Hura crepitans.

Florida Agricultural Experiment Station

298. Holothrips tenuis Hood ('14f, p. 52, figs.).
On leaves of Hura crepitans.
77. LEPTOTHRIPS Hood ('09)
Key to the Species
a. Intermediate antennal segments elongated, nearly 1.5 times as
long as 2; postoculars short; at least antennal segment 4 yellowish
at the base.
b. Prothorax larger, usually nearly as wide as pterothorax; only
antennal segment 3 clear yellow, 4 yellowish at the base;
usually 4 to 6 interlocated hairs on fore wings ----.--... mali.
bb. Prothorax smaller, much narrower than pterothorax; anten-
nal segments 4-8 more or less yellow, usually shaded with
brown but often pure yellow; usually 6 to 8 interlocated hairs
on fore wing --.....- .. ..--- ..... ---....-.---..- --.......-...-... adirondacks.
aa. Intermediate antennal segments short, but little longer than 2;
postocular bristles long; fore wings with simple fringe.
b. Antennal segment 3 pale yellow.
c. Cheeks diverging posteriorly.------.....-........-..-- .....f-asciculatus.
cc. Cheeks converging posteriorly .........fasciculatus stenoceps.
bb. Whole antenna dark brown..................---. ..................... russelli.
299. Leptothrips mali (iFitch). The Black Hunter.
(Phloeothrips mali Fitch, '54; Cryptothrips aspersus Hinds, '02,
p. 205, figs.; C. californicus Daniel, '04; Phyllothrips aspersus
Hood, '08b; Leptothrips aspersus Hood, '09c; Liothrips mccon-
nelli Crawford, '10b.; ref. Hood, '12; Hood, 14c, p. 162; Moznette,
'20, p. 47.)
A predaceous species found feeding on almost any plant. Eats
other thrips, mites, and aphids. Hibernated in a burrow in a
dead cherry twig in B. C. (Treherne, '19).
Mass.,-Wis.,-B. C.,-Cal.,-Fla., Mexico, Panama, Barbados.
300. Leptothrips adirondacks (Watson).
(Cryptothrips adirondacks Watson, '21b, p. 83).
On willow and Virburnum alnifolium.
Cranberry Lake, N. Y.
301. Leptothrips fasciculatus (Crawford).
(Phyllothrips fasciculatus Crawford, '09b, p. 105, figs.)
On Eriogomum fasciculatum (Wild buckwheat).
Claremont, Cal.
302. Leptothrips fasciculatus stenoceps (Crawford).
(Phyllothrips fasciculatus stenoceps Crawford, '09b, p. 108.)
On Eriogonum fasciculatum.
Claremont, Cal.
303. Leptothrips russelli Morgan ('13, p. 39, figs.).
"Apparently feeding on exudation from a peach tree caused by
Anarsia lineatella."
304. Gynaikothrips uzeli (Zimm.). The Cuban Laurel Thrips.
(Mesothrips uzeli Zimmerman; M. ficorum Marchal; Phloeothrips

Bulletin 168, Thysanoptera of North America

ficorum Marchal; P. longitubus; Leptothrips flavicornis; Lio-
thrips bakeri Crawf., '10b, p. 161.)
On Ficus nitida, F. religiosa, F. benjamin, F. retusa. A severe
pest on the wild rubber.
Key West (Russell) and Miami (Wilmon Newell), Fla.; Porto
Rico, Cuba (Russell, '12b) ; Canary Islands, Algeria, Java.

79. CRYPTOTHRIPS Uzel ('95)
Key to the Species
a. Antennae 8-segmented.
b. Postocular and prothoracic bristles knobbed or at least with
dilated (often colorless) tips.
c. Body length about 1 mm., color dark luteous with blackish
brown abdomen ---..........--------------------------------exiguus.
cc. Much larger; color of body a nearly uniform dark or yel-
lowish brown.
d. Antennal segment 3 shorter than 4, brownish yellow;
about 1.7 mm. long................---..............---------salicis.
dd. Antennal segment 3 nearly or quite as long as 4.
e. Head little if at all constricted posteriorly.
ee. Head markedly constricted posteriorly ..--collaris.
bb. Postocular and prothoracic bristles blunt; only antennal seg-
ment 3 clear yellow; length about 2.7 mm.................---.....laureli.
bbb. Postocular and prothoracic bristles pointed.
c. Color nearly uniform black, at most only tarsi and an-
tennal segment 3 lighter.
d. Head a third longer than wide, post-ocellar bristles
weak; length 2.7 mm .....................------ rectangularis.
dd. Head at least 1.5 times as long as wide; post-ocellar
bristles nearly as long as postocular.
e. Sides of the tube nearly straight, male 2.2 mm.
long ........--............---.....----.---------carbonarius.
ee. Tube constricted just above the apex; male 1.2
mm. long, female 2.2 mm......-..........-....-...--- ongiceps.
cc. Chestnut brown, fore femora, tibiae, tarsi, antennal seg-
ment 3 and apex of 2 yellow or yellowish brown......collaris.
ccc. Prothorax, mesothorax and sides of metathorax orange
d. Legs and antennal segments 1 and 2 orange yellow;
head brown ...----................--........ .......... -----gilvipes.
dd. Antennal segments 2-5 yellow... ----.........---..........bicolor.
aa. Antennae 7-segmented ........................-----..---------.junctus.
305. Cryptothrips exiguus Hood ('12, p. 154, figs.).
"Taken in sweeping."
306. Cryptothrips salicis Jones ('12, p. 20, figs.).
On willow galls.
San Jose, Cal.

Florida Agricultural Experiment Station

307. (?) Cryptothrips floridensis Watson ('13, p. 145, figs.).
The Camphor Thrips.
Northern and central Fla., southern Ala. and Miss., La.;-Texas
(Ed L. Ayers).
(Hood, '18, places this species in the genus Liothrips. It has been
left here until the male can be examined. If this is a Liothrips,
the next undoubtedly is also as they are very closely related.)
308. (?) Cryptothrips laureli Mason ('22, p. 193, figs.).
Bays (Tamala sp.) and occasionally camphor.
North and central Fla.
309. Cryptothrips collaris Bagnall ('17, p. 26, figs.).
St. Vincent, W. I.
310. Cryptothrips rectangularis Hood ('08b, p. 307, figs.).
Under bark of dead peach tree and in burrow in dead willow
Ill., Pa., Del. (Morgan, '13).
311. Cryptothrips carbonarius Hood ('08, p. 376, figs.).
Taken in sweeping grass and weeds.
312. Cryptothrips longiceps Hood ('12, p. 153, figs.).
On peach and hickory branches.
313. Cryptothrips gilvipes Hood ('14c, p. 169, figs.).
In cocoons of Gelechia trialbamaculata.
Md., N. J.
314. Cryptothrips bicolor (Heeger).
(Phloeothrips bicolor Heeger.)
In grass.
N. Y. (Hood, '14c, p. 170); Austria, Czecho-Slovakia.
315. Cryptothrips junctus Hood ('12d, p. 140).
Under bark of pine and dead willow, white oak, maple, and syca-
Md. (Hood, '17), Mich., Ill.


316. Megalomerothrips eupatorii Watson ('19, p. 99; male, '22d).
By beating Eupatorium serotinum in bloom, in the burrow of
a cerambycid in an avocado twig, in a colony of Icerya (E. W.
Berger). Probably predaceous.
Gainesville and Winter Haven, Fla.

81. KARNYOTHRIPS (new name)
(Karnyia Watson, '22c, p. 6; name preoccupied.)

317. Karnyothrips weigeli (Watson).
(Karnyia weigeli Watson, '22c, p. 7.)
On camphor infested with the camphor scale (Pseudaonidia
duplex), on which it feeds (Dozier).
New Orleans, La.

Bulletin 168, Thysanoptera of North America

Key to the Species
a. Tibiae and first two antennal segments concolorous with the body,
blackish brown, body with crimson hypodermal pigment.... corticis.
aa. Tibiae and first two antennal segments yellow.................tibialis.
318. Polyphemothrips corticis Hood ('14c, p. 167, figs.).
On branches and under bark of dead tree.
319. Polyphemothrips tibialis Hood and Williams ('15, p. 136, figs.).
On a privet hedge.
New Orleans, La.

Key to the Species
a. Wings wanting or reduced to pads: all tibiae and tarsi bright
yellow, tibiae often clouded with brown at the base..............flavipes.
aa. Wings fully developed but short.
b. Color coal black, without markings, tarsi dark brown.
bb. Color dark brown with much bright red hypodermal pigment.
320. (?) Gigantothrips flavipes (Hood).
(Idolothrips flavipes Hood, '08, p. 377, figs.)
Always among fallen leaves upon which it apparently feeds.
Ill., Tenn. (Morgan, '13), Fla.
321. (?) Gigantothrips coniferarum (Pergande).
(Idolothrips coniferarum Pergande, '96.)
On red cedar (Juniperus virginiana), Pinus inops, Abies.
N. H., Mass., Md. (Hood, '17), Va., D. C.
322. (?) Gigantothrips fuscus (Watson).
(Idolothrips fuscus Watson, '21b, p. 84.)
Old abandoned burrows of a cerambycid.
N. Y., Mass.

84. DICAIOTHRIPS Buffa ('09)
Key to the Species (largely after Bagnall)
I. Large insects (5 mm. or more) of the tropics and subtropics.
a. Head more strongly produced beyond the eyes; bristles at the apex
of abdominal segment 9 shorter than the tube; segment 8 longer or
only slightly shorter than 7.
b. Postocular bristles present.
c. Body length about 10.5 mm.........................Male, champion.
cc. Body length about 5.25 mm.....................Female, angusticeps.
bb. Postocular bristles apparently absent.
c. Abdominal segment 8 decidedly longer than 7 or the tube.
Male, grandis.
cc. Segment 8 no longer than the seventh; tube longer than
either segment 7 or 8.
d. Head about 2.5 times as long as broad; antennal seg-
ment 3 half the length of head, and the three apical

Florida Agricultural Experiment Station

segments together as long as 4; prothorax foveolate;
abdominal segment 8 shorter than 7 ...Male, foveicollis.
Tube more slender, and at least as long as the head;
bristles at the apex of abdominal segment 9 are .75
the length of the tube.................-......Female, foveicollis.
dd. Head more slender, about three times as long as
broad; antennal segment 3 less than half the length
of the head, and the three apical segments together
1.67 times as long as 4; prothorax smooth; abdominal
segments 7 and 8 sub-equal.........-----..........--Male, laevicollis.
Tube stouter, not as long as the head; bristles at apex
of abdominal segment 9 as long as the tube.
Female, laevicollis.
aa. Head very slightly produced beyond the eyes; bristles at the
apex of abdominal segment 9 longer, or at least as long as the
tube; segment 8 considerably shorter than 7.
b. Head longer, 2.75 as long as broad; eyes occupying about .25
the side of the head; tube a little more than two-thirds as long
as the head; bristles at the posterior angles of the prothorax
weaker and not so long................. -----................ Male, distinctus.
bb. Head shorter, 2.3 times as long as broad; eyes occupying not
quite a third of the side of the head; bristles on the posterior
angles of the prothorax longer and stouter; tube .75 times
the length of the head..................................--- Female, brevicornis.
II. Smaller, northern species.
a. W ings fully developed but short......................................armatus.
aa. Wings large and powerful ....................................- tuberculatus.
323. Dicaiothrips champion Bagnall ('10c, p. 375, figs.).
Cerro Zunil, "Cent. Am.";-Chiriqui Mts., Panama, May -9, 1923
(F. M. Gaige Coll.).
324. Dicaiothrips angusticeps (Crawford).
(Idolothrips angusticeps Crawford, '10b, p. 160, figs.).
On unidentified plants.
Belize, Nicaragua, Mexico, Cuba.
(Rhaptothrips peculiaris Crawford, '09, p. 116, figs., is evidently
founded on an immature specimen and is perhaps this species.
"On a certain spiny solanaceous plant," Guadalajara, Mexico.)
325. Dicaiothrips grandis Bagnall ('10c, p. 373).
Cerro Zunil, "Central Am."
326. Dicaiothrips foveicollis (Bagnall).
(Idolothrips foveicollis Bagnall, '08, p. 375).
Cerro Zunil, Tabasco.
327. Dicaiothrips laevicollis Bagnall ('09).
Venezuela, Trinidad (Bagnall, '15, p. 499).
328. Dicai,othrips distinctus Bagnall ('09, p. 378).
329. Dicaiothrips brevicornis Bagnall ('10c).
Under bark and leaves of dead cocoanut palms; sour sop, cacoa.
Trinadad (Bagnall, '15, p. 499, desc. of male), St. Vincent (Bag-

Bulletin 168, Thysanoptera of North America

nall, '17.);-Puerto Arturo, Honduras (T. H. Hubbell, Coll.).
"Common on cacao leaves at some seasons."
330. Dicaiothrips ? armatus (Hood).
(Idolothrips armatus Hood, '08c, p. 285, figs.).
In galls of Gnorimoschema gallaesolidaginis on golden-rod, and
on Plantago rugelii:-Arundinaria tecta.
Md., Va., Ill.;-Miss. (H. L. Dozier, Coll.).
331. Dicaiothrips tuberculatus (Hood).
(Idolothrips tuberculatus Hood, '08c, p. 387, figs.).
On white oaks;-Tilia americana.
Md., Va., Ill., Mo.:-Fla.


332. Elaphrothrips longiceps (Bagnall).
(Idolothrips longiceps Bagnall, '08, p. 211, figs.).
Mexico (Buffa, '09, p. 104), Nicaragua (Bagnall, '10c)..

Key to the Species

a. Color black except the dark brown tarsi; head rounded in front;
eyes not protruding; mouth cone reaching nearly across the
prosternum. .....................----. --------- -- ------------ ----spinosus.
aa. Color dark brown with orange pigment, tibiae, tarsi, and bases
of antennal segments 3-6 yellowish; head prolonged in front;
eyes not protruding; mouth cone hardly reaching the middle of
the prosternum .. ....- .... -... ... ........ ......... ----..... ....hesperus.
333. Megalothrips spinosus Hood ('08b, p. 306, figs.; '09, p. 231; '14c,
p. 170).
In burrows in dead willow and oak stems, under bark of dead
white birch, in galls of Gnorimoschema gallaesolidagensis on
golden-rod (Hood, '17).
Mass, N. Y., Pa., Md., Va., Ill. (Hood, '17), Minn. (Hood, '14).
334. Megalothrips hesperus Moulton ('07, p. 65, figs.).
Stanford Univ., Cal.

87. CHIROTHRIPOIDES Bagnall ('15)

335. Chirothripoides typicus Bagnall ('15, p. 505, fig.).
Taken on a window.
Trinidad, W. I.

74 Florida Agricultural Experiment Station


Erythrothrips durango n. sp.
Female: Color dark brown with much red hypodermal pigment in
the thorax. Antennal segment 3 bright yellow.
Measurements: Head, length .267 mm.; width .214 mm.; prothorax,
length .240 mm.; mesothorax, width .48 mm.; abdomen, width .52 mm.; an-
tennae; segment 1, 43; 2, 69; 3, 144; 4, 123; 5, 82; 6, 80; 7, 72; 8, 29; 9, 18
microns; total length .66 mm.
Head about as long as prothorax and one and a fourth times as long
as wide; rounded in front, frons not overhanging bases of antennae. Eyes
dark, not protruding, pilose, facets large. Ocelli present, rather smaller
than the facets of the eyes. Mouth cone reaching the middle of he pro-
thorax, sharp-pointed; maxillary palpi geniculate, 7-segmented; labial palpi
3-segmented. Antennae 9-segmented; 2.5 times as long as the head, dark
brown, concolorous with the head except segment 3 which is bright yellow
excepting a brown cloud at the extreme apex and a colorless ring at the
base just above the pedicel and the apex of 2 which is lighter brown with
bright red pigment in the membrane, 8 and 9 a little paler. Segment 1
cylindrical, 2 urn-shaped with a broad pedicel, 3 elongate wedge-shaped wita
straight sides abruptly contracted to a narrow pedicel, 4-7 cylindrical, 8
conical; sense areas on segments 3-8, those on 3-6 long and narrow, the one
on 3 extending thruout the apical half of the segment, on 4 the apical .6, on
5 and 6 the apical third, those on 7 and 8 short oval. All segments closely
set with rather short bristles, those on 3 colorless, on 8 and 9 pale, on the
other segments dark.
Prothorax about as wide as long, no conspicuous bristles but numerous
minute ones, except the fore coxae each of which has three stout bristles on
the outer angle. Legs long and slender, fore femora scarcely enlarged; dark
brown, tarsi a little lighter; clothed with numerous short hairs which are
especially numerous and stouter on tibiae, two at the distal ends are stout
Pterothorax much wider than the prothorax, sides strongly arched
and converging posteriorly, anterior dorsal surface deeply striated with
anastomosing lines. Fore wings of equal width thruout except for a very
slight enlargement just beyond the scale. This enlargement is about 4
percent of the width in the middle. Fore wings rounded at the tip. Veination
as in E. arizonae. All of the ring vein except the extreme base and the outer
half of the fore longitudinal vein set with numerous short, white, inconspic-
uous spines. Posterior longitudinal vein with about 36 dark stout bristles.
Only outer three-fourths of the posterior margin fringed with rather short
and sparse hairs. Posterior part of the membrane with a broad dark band
extending from the base to the tip, widest in the middle where it covers
nearly half the width of the wing. The posterior longitudinal vein lies
entirely within this dark band.
Abdomen broadly elliptical, broadening abruptly to segment 4 and
tapering more gradually posteriorly. Long black bristles on the last two
segments only.
Male not seen.

Bulletin 168, Thysanoptera of North America

Described from a single female taken from agave flowers at Tlahualilo,
Durango, Mexico, by F. F. Bibby on May 10, 1923.
Undoubtedly cogeneric with Erythrothrips arizonae Moulton but the
description of that genus given by Moulton ('11) will have to be modified
in respect to the 8-segmented maxillary palpi. This species can readily be
distinguished by the yellow third antennal segment.

Heterothrips mexicanus n. sp.

Female (macropterous). Length about 1.3 mm. Color dark brown, tar-
si, tips of middle and hind tibiae, most of fore tibiae, and tip of fore femora,
and antennal segments 3 and 4 yellowish. Fore wings brown except for a
colorless area just beyond the scale.
Measurements: Head length, .11 mm., width, .16 mm.; prothorax
length, .14 mm., width .22 mm.; pterothorax width, .28 mm.; abdomen width
.30 mm.
Antennae. Segment 1 2 3 4 5 6 7 8 9
Length 26 36 75 46 34 36 23 19 18
Width 30 27 22 21.5 20 16 12 7 8 microns
Total length .285 mm.
Head about 1.5 times as wide as long, width behind the eyes only a
trifle greater than the distance across them. Cheeks decidedly convex and
markedly contracted posteriorly, roughened, and with two conspicuous, thick
but short, curved spines behind the eyes; occiput with five strong striae ex-
tending entirely across, not anastomosing; postocular bristles minute; a pair
of somewhat longer bristles midway between the anterior and posterior
ocelli, and a minute pair in front of the anterior ocellus. Eyes large, occupy-
ing fully two-thirds the length and nearly two-thirds the width of the head,
setose, facets large. Ocelli yellow, the anterior situated opposite the an-
terior third of the eyes, somewhat smaller than an ocular facet. The pos-
terior near the posterior border of the eye, very large, twice the diameter
of the anterior and much larger than an ocular facet. Antennae 2.6 times
as long as the head; segments 1, 2, and 5-9 concolorous with the head, 3 and
4 light grayish yellow, 4 shaded with brown on the pedicel and with a brown
ring just below the ring of sensoria; segment 3 three times as long as the
greatest width (across the apex), sharply constricted in the basal fifth and
two-fifths, 4 oblong with a distinct, thick pedicel, 5-7 ovate, tapering to a
broad pedicel at the base, 8 barrel-shaped, not pedicellate, 9 conical. Seg-
ment 1 bears a few dark and rather conspicuous but short bristles, all others
pale and inconspicuous.
Prothorax nearly a third longer than the head, lateral and posterior
borders very convex and bearing a number of short, thick bristles, those
on the anterior angles longest. Pronotum striated, deeply so posteriorly,
and bearing numerous short bristles.
Pterothorax rounded in front. Fore wings considerably more than
half as wide in the middle as in front of scale; length nearly ten times the
greatest width. Dark brown except a colorless area at the base which
includes all but the extreme base of the scale. Costal margin with about
32 short, stout bristles, anterior vein with 27 and posterior with 26. To-
ward the base these bristles are very pale and short. Hind wing lighter
brown, colorless toward the base except for the dark brown vein.

Florida Agricultural Experiment Station

Abdomen rather long. Pubescens on faint anastomosing lines, numer-
ous on only the posterior segments. Sides of the posterior margins of seg-
ments 2-7 fringed with contiguous chitinous scales whose apical margins
are evenly fringed with spines which are as long as the scales. In the mid-
dle of the margins are a few minute bristles which on segments 7 and 8
are long and conspicuous. Sternites fringed with slender bristles which are
shorter than those on the dorsal side of segments 7 and 8. At the sides,
these spines are always fused at the base into about a dozen scales similar
to those on the dorsal side.
Male: Similar to the female but smaller. Near the anterior margins
of abdominal sternites 2-7 are long, oval,, transparent areas which extend
nearly a third of the width of the sternites.
Measurements: Total length 1 mm. Head length .107, width .145 mm;
prothorax length .13 mm, width .19 mm.; pterothorax width .21 mm.; ab-
domen width .17 mm. Antennae, total length .27 mm.
Segment ....-.....-- ... 1 2 3 4 5 6 7 8 9
Length ................ 19 32 69 45 32 33 21 14 17 microns
Width ................ 27 24 21 19 16 14 11 9 7 microns
Described from numerous females and males collected from flowers of
Sphaeralcea cuspidata and Sida hederacea at Tlahualilo, Durango, Mexico,
by F. F. Bibby.
Very close to H. pectinifer Hood, described from Arizona but differs in
the color of the fore tibiae, the fourth antennal segment, which is also
considerably shorter, in the greater fusion of the. spines on the abdominal
sternites, in the scarcely anastomosing striae of the head which extend into
the ocellar region and in the larger extent of the white area of the wings.
Chirothrips floridensis var. catchingsi, n. var.
Differs from the species in having two stout bristles at the posterior
angle of the prothorax and in the shape of the seventh antennal segment.
In the variety this is larger and its base is nearly as wide as the apex of
segment 6 and gradually narrowed anteriorly. In the species this segment
is smaller and little if any wider at the base than at the apex.
In the presence of two stout bristles at the posterior angles of the pro-
thorax this variety approaches C. manicatus but the bristles are weaker. In
all three there are three bristles on each posterior angle and they differ in
size only. In all three the middle bristle is small. In manicatus the others
are subequal in length and about as long as the eyes. In floridensis and
the variety the anterior is about half as long as the eyes. In the new*
variety the posterior is about as long as the anterior but in floridensis but
little larger than the middle bristle. These differences appear very constant.
Described from 11 females captured on grass by Thos. F. Catchings
at New Orleans, La.
Sedulothrips hubbelli n. sp.
Color, almost uniform dark brown, but with red hypodermal pigment,
especially on abdomen, and a large white spot at each fore angle of segments
3-8. Antennae a lighter brown especially in middle of segments 3-5, no
yellow anywhere. Apical half of tube and wings lighter.
Measurements: Total body length 3.3 mm.; head, length .54 mm.;
width .26 mm.; prothorax, length .22 mm., width .47 mm.; mesothorax,
width .52 mm.; metathorax, width .47 mm.; abdomen, width .45 mm.; tube,

Bulletin 168, Thysanoptera of North America 77

length .24 mm., width at base .09 mm., width at apex .05 mm. Antennae
total length .90 mm.
Segment ..--...........-....-- 1 2 3 4 5 6 7 8
Length ...............-...... 60 77.5 221 159 153 102 78 44 microns
Head twice as long as wide, much the widest across the eyes, cheeks
widest a short distance behind the eyes, cheeks gently arcuate with short
collar at base. Roughened with low protuberances and short bristles. Post-
ocular bristle about half as long as the eyes, with dilated tips.
Eyes finely and closely faceted, non-pilose, markedly protruding, deep
red by reflected light. Ocelli far forward, equidistant. Antennae 1.7 times
as long as head, very slender and long. Segments 1 and 2 cylindrical, 2
abruptly thickened in the middle; 3-5 clavate, abruptly narrowed to a wide
collar at apex; 6 clavate, shorter than 7 and 8 together; 7 sub-cylindrical,
tapering apically; 8 conical. Sense cones on segments 3-5 a little over
one-fourth the length of segment 3, pale yellow, the accompanying bristle
longer and darker. Mouth cone very long and slender, reaching far past the
Prothorax deeply emarginate in front, bristles rather short, heavy,
with dilated tips. Mesothorax sub-quadrangular, sides nearly straight and
parallel. Metathorax slightly narrower, sides strongly arched and narrowed
posteriorly. Wings long, brown, fore wings with a clear spot on the pos-
terior half above the scale and along the opposite costal margin. Fringing
hairs long and extending to the widened base, 22 to 35 interlocated ones.
Apical half of both pairs lighter except along the middle. Legs long and
slender. Fore femora considerably enlarged, greatly so in male.
Abdomen very long and slender, marginal bristles stout, sharp-pointed,
those on segment 9 about twice as long as the tube. Tube about half as long
as head, terminal bristles about as long as the tube. Male similar to female.
Described from about forty females and several males collected from
rubber trees along Tela Railroad in Honduras by T. H. Hubbell.
Similar to Sedulothrips vigilans (Hood) but different in color, the more
protruding eyes, mouth cone, and heavy abdominal bristles and in many
other characteristics. In color it approaches Sedulothrips insolens (Bag-
nall), but in other characteristics is closer to vigilans.

Neoeurhynchothrips n. gen.
Head longer than broad but a little longer than the prothorax. Frons
elevated and bearing the ocelli well forward, anterior ocellus directed for-
ward. Mouth cone large, reaching the mesosternum, sides very straight.
Antennae 8-segmented, all segments well separated.
Prothorax about one and a half times as broad as long, with a long
bristle on each posterior angle. Fore femora somewhat enlarged. Fore
tarsi unarmed. Wings of equal breadth thruout except for a shallow but
plain constriction above the scale. Abdomen long; tube short, but little
more than half the length of the head.
In the large mouth cone this genus approaches Eurhynchothrips Bag-
nall, but differs in the longer head and prothorax and the swollen fore
femora. In the long prothorax it approaches Rhynchothrips Hood, but dif-
fers in the distinct seventh and eighth antennal segments. From Arrheno-
thrips Hood it differs in lacking tarsal teeth.
Type Neoeurhynchothrips cubensis n. sp.

78 Florida Agricultural Experiment Station

Neoeurhynchothrips cubensis n. sp.
Length about 1.8 mm. Color an almost uniform light brown, legs
yellowish brown. Terminal antennal segments darker.
Measurements: Head length .22 mm., width .21 mm.; prothorax,
length .21 mm., width .33 mm.; mesothorax, width .34 mm.; abdomen, width
.36 mm., tube length .135 mm., width at base .775 mm., at apex .04 mm. An-
tennae, total length .35 mm.
Segment ..........................- 1 2 3 4 5 6 7 8
Length ..................-....... 38 45 58 49 48.5 44 44.5 29 microns
Width ............................ 37 29 29 32 29 27 29 19 microns
Head a little longer than broad, widest at the base, cheeks straight
or even slightly concave, either converging or diverging posteriorly. Dor-
sum faintly sculptured with anastomosing lines. Vertex not overhanging
the bases of the antennae. Postocular bristles long, in common with most
prominent bristles of the body blunt. Posterior to each postocular is a
row of five small bristles. Eyes rather small, occupying only about a fourth
of the length of the head, non-pilose, facets of moderate size. Ocelli situated
far forward, the posterior pair anterior to the middle of the eyes, sur-
rounded by deep orange pigment. Mouth cone very long, reaching the
mesothorax, with straight sides. Antennae about one and one-half times
as long as the head. Segment 1 a short truncated cone, 2 cylindrical with
a very broad pedicel, 3 triangular in outline, 4-7 urn-shaped, 8 conical,
sharply and abruptly contracted at about the middle of the inner edge, deeply
crenulated. Hairs and sense cones rather short, the latter colorless.
Prothorax almost as long as the head, one and a half times as wide
as long. Pronotum, posteriorly, faintly striate with anastomosing lines.
Posterior angles well rounded and bearing a very long, curved, yellow,
bristle. Near the curved posterior margin are two other pairs of bristles,
the middle pair short, the outer two-thirds as long as those at the angles.
A strong bristle on each coxa, a row of four moderately long-pointed ones
near the anterior margin and one near each lateral margin. Legs, espe-
cially the fore pair, rather short.
Wings very short; membrane only about half as long as the abdomen.
That of the fore pair brown, darker at the base, posterior vein darker.
Three strong bristles at the base of the anterior margin. Fringing hairs
rather sparse but moderately long, absent from the basal fourth. From
five to seven interlocated bristles on the posterior margin. Membrane of
the posterior pair clear except at the extreme base.
Abdomen long and heavy; cylindrical. Each posterior angle of each
segment bears a long bristle with blunt or dilated tip; those on segment
9 much longer than the tube. A little toward the mid-dorsal line from this
bristle on segments 2-9 is a similarly long bristle and still farther toward
the mid-dorsal line a dark, sigmoid, sharp-pointed one. Tube short, but
little more than half as long as the head, sides straight, sharply converging
posteriorly. Terminal bristles about as long as the tube, sharp-pointed.
Larvae yellow with much red hypodermal pigment.
Described from four females taken at Philadelphia on Uriesia sp.
from Cuba by Max Kisliuk of the Federal Horticultural Board.
Type in the author's collection. Paratype in the National Museum.

Bulletin 168, Thysanoptera of North America

Liothrips bibbyi, n. sp.

Female. Length about 1.6 mm. General color dark, blackish brown,
tarsi, fore tibiae, and antennal segments 4-6 lighter brown, 3 yellow.
Head 1.1 longer than broad, broadest immediately behind the eyes
thence tapering gradually to the base of the mouth cone which is slightly
swollen. The smallest diameter is .9 the greatest. Cheeks nearly straight,
slightly roughened and with a few inconspicuous bristles. The entire dor-
sal surface of the head sculptured with faint anastomosing striae. Post-
ocular bristles fully as long as the eyes, sharp pointed. Vertex slightly
rounded in front, over-reaching about a third of the first antennal segment
and bearing the forwardly directed anterior ocellus on its extremity. Ocelli
colorless, large, about 2.5 times the diameter of an ocular facet; situated
far forward, the posterior opposite the anterior third of the eyes and con-
tiguous with their margins. Eyes of medium size, occupying slightly more
than a third of the side of the head, non-protruding, minutely pilose.
Mouth cone long, reaching the mesosternum, sharp-pointed. Anten-
nae 8-segmented. Segments 1 and 2 slightly lighter than the head; 3 yel-
low shaded with brown on the outer edge as are also 4-6, 4-6 brownish yel-
low, 5 and 6 also shaded on the apical half, 7 and 8 uniformly dark brown;
2 cup-shaped with a broad pedicel; 3 clavate, tapering evenly to a rather
narrow base, 4 ovate, 5 and 6 barrel-shaped, 7 oblong, 8 conical with a cre-
nate margin, 4-7 with distinct broad pedicels, that of 6 being somewhat
narrower. Bristles and sense cones rather long but almost colorless.
Prothorax .6 as long as the head and 2.3 as wide as long. Spines
brown, heavy, and long, sharp-pointed, one on each posterior angle being
especially long; a row of 6 equal ones along the anterior margin.
Pterothorax wider than the prothorax, slightly narrowed posteriorly.
Wings long. The fore pair shaded with yellow at the extreme base along
the anterior margin which bears three large and one small bristle. Pos-
terior margin with 14 to 20 interlocated hairs. Legs rather long. Fore
tarsi unarmed.
Abdomen large, abruptly rounded from the seventh segment. Pro-
vided with yellow bristles, the posterior ones and those at the apex of the
tube about as long as the tube. Tube about .8 times as long as the head;
rather abruptly tapering posteriorly.
Measurements: Head, length .226 mm., width .204 mm.; prothorax,
length .134 mm., width .32 mm.; pterothorax, width .36 mm.; tube, length
187 mm.; antennae, total length .45 mm.
Segment ......................... 1 2 3 4 5 6 7 8
Length ...............-.......... 40 50 78 69 64 62 59 40 microns
W idth ...--.........-..- .......... 35 32 29 36 33 30 27 19 microns
Described from two females collected from Sphaeralcea cuspidata at
Tlahualilo, Durango, Mexico, by F. F. Bibby after whom the species is
Somewhat close to L. ocellatus (Hood) but differs in the sharp-pointed
bristles, smaller size, and many other characters. A very distinct species.
In color this species shows a remarkable resemblance to L. caryce Fitch,
the resemblance even extending to the shading on the antennal segments.
The shape of the abdomen will readily distinguish them.

Florida Agricultural Experiment Station

Liothrips perseae, n. sp.

Color: uniform black; tarsi and bases of fore tibiae dark brown, an-
tennal segments 3 to 5 mostly yellow.
Measurements: Total body length 2.6 mm.; head, length .37 mm.,
width .24 mm.; prothorax, length .22 mm., width .43 mm.; mesothorax,
width .53 mm.; metathorax, width .49 mm.; abdomen, width .55 mm.; tube,
length .25 mm., width at base .105 mm., width at apex .06 mm.; antennae,
total length .55 mm.
Segment ..........-................ 1 2 3 4 5 6 7 8
Length .......................... 40 61 118 104 87 85 67 43 microns
Width ............................ 37 37 27 37 35 37 39 21 microns
Head, 1.55 times as long as greatest width which is a short distance
behind the eyes. Cheeks converging sharply posteriorly, nearly straight,
roughened with low protuberances and short bristles, postocular bristles
usually fully as long as the eyes, blunt. Eyes large, occupying a third of
the length and two-thirds the width of the head, non-pilose; facets large.
Ocelli, large, situated far forward, anterior on a low elevation that projects
slightly beyond the eyes, anteriorly directed. Antennae 1.5 times as long
as the head. Segment 1 concolorous with the head. Segments 3, 4, and basal
half of 5 clear yellow except for a brown spot on the anterior margin of
4. Segment 3 sub-cylindrical, only slightly widened apically, 4 clavate,
5 and 6 barrel-shaped narrowed to wide pedicel, 6 ovoid and wider than any
of the others, 8 conical, 6 to 8 with created margins.
Prothorax small, subrectangular, much shorter than the head; heavy
black, blunt bristles on all angles and a still larger one on each coxa, mid-
laterals shorter, curved. Mesothorax rectangular, considerably wider than
prothorax, sides nearly straight. Metathorax narrower than the mesothorax
sides strongly arched. Wings rather long, membranes clear except at the
extreme bases which are tinged with light brown. Fringing hairs moder-
ately long, from 13 to 21 interlocated ones on fore wings. Legs rather long
and slender. Abdomen rather heavy, lateral bristles light brown, the long-
est pointed, others blunt. Tube about three-fourths as long as the head,
sides nearly straight.
Described from six females collected from an avocado tree at Puerto
Arturo, Honduras, April 4, 1923, by T. H. Hubbell. Resembles Liothrips
brevicornis Hood, in color, shape of head, and character of bristles, but
differs in many characters, especially the color and shape of the antennal
segments. Paratypes in the author's collection. Type in Museum of the
University of Michigan.

Hindsiana catchingsi, n. sp.

General body color a slaty gray. Pterothorax and anterior segments of
the abdomen much lighter. Only antennal segment 3 and fore tibiae and
tarsi always yellow. The posterior .4 of abdominal segments 1-7 and middle
and hind tarsi sometimes also yellow.
Measurements: Total body length 1.5 mm.; head, length .19 mm.,
width .16 mm.; prothorax, length .16 mm., width .29 mm.; abdomen, great-
est width .30 mm.; tube, length .11 mm., width at base .065 mm., at apex
.04 mm.; antennae, total length .32 mm.

Bulletin 168, Thysanoptera of North America

Segment .--.............-....- .... 1 2 3 4 5 6 7 8
Length .......................... 35 41 49.5 51 43 42 47 29 microns
W idth ........................... 35 28 27 28 24 22 18 ,9 microns
Head but little longer than wide, widest across the middle of the
cheeks. Cheeks nearly parallel, slightly arched, roughened; vertex smooth;
postocular bristles fairly long but pale, with dilated tips. Eyes small,
occupying about a third of the length of the head and half its width, dark
reddish brown, non-pilose, facets small. Ocelli small, situated far forward,
posterior pair about opposite the middle of the eyes. Mouth cone short,
scarcely reaching the middle of the prosternum, sides straight, apex broadly
rounded. Antennae one and two-thirds times as long as the head. All but
segment 3 brown, concolorous with the head, 2 lighter in apical half, 3
yellow shaded with brown in apical half, tip colorless. Segment 1 cylindri-
cal, 2 cup-shaped with a broad and rather long pedicel, 3 top-shaped, 4-6
barrel-shaped with broad short pedicels, 7 cylindrical, 8 conical. Sense
cones and bristle pale and inconspicuous.
Prothorax about as long as the width of the head, 1.8 times as wide
as long; posterior angles broadly rounded and each bearing a moderately
long but pale bristle with dilated tip; a somewhat longer bristle on each
coxa. Pterothorax sub-rectangular, sides converging slightly posteriorly,
much paler posteriorly, sometimes deep yellow. Legs rather short, femora
concolorous with the prothorax, all somewhat swollen, the middle ones least
so, the fore most, the latter about seventh-elevenths as wide as head, mid-
dle and hind tibae and tarsi varying from gray tinged with yellow, to yel-
low tinged with brown, fore tibiae yellow, tinged with brown on outside;
fore tarsi with a low blunt swelling which can hardly be called a tooth.
Wings rather short, membrane of fore pair gray, much contracted in the
middle, fringing hairs rather sparse, three or four interlocated ones.
Abdomen cylindrical, variable in length and color; in three specimens
rather short, brownish gray, darker posteriorly, with considerable purple
hypodermal pigment; in one specimen the abdomen is long and slender and
the posterior .4 of segments 1-7 bright yellow; long bristles on segments
7-9 only; some of those on 7 and 8 knobbed; those on 7 and 9 much longer
than the tube, pointed. All bristles are pale and inconspicuous. Tube about
.6 as long as the head, basal width considerably more than half the length.
Color gray, deeply shaded with brown on basal half. About six terminal
bristles fully twice as long as the tube, dark brown, pointed.
Larvae grayish with much red hypodermal pigment.
Described from four females collected from ponderosa lemon tree in
association with Chrysomphalus aonidium at New Orleans, La., by Thos.
F. Catchings. Type in the author's collection. Paratype retained by Mr.

Haplothrips orlando has been made the type of a new genus, which is
named for Prof. R. C. Treherne, the Canadian thysanopterist.


Head about as long as wide; cheeks rounded, with a few short spines
which arise from barely visible tubercles. Eyes fairly large, protruding;
interval between them not nearly equal to their dorsal width. Antennae

82 Florida Agricultural Experiment Station

8-segmented, segments rather short, 8th subpedicellate. Mouth cone short,
barely reaching the middle of posternum, broadly rounded at the apex.
Pronotum considerably shorter than the head, over twice as broad
across posterior angles (inclusive of coxae) as median dorsal length, pos-
terior and anterior margins concentric. Fore femora somewhat enlarged
in the female, much so in the male, fore tarsi armed with a stout tooth
which is larger in the male than in the female. Wings with long fringing
hairs, with a good series (19 in the type species) of interlocated ones on
fore wings. Membrane not at all or barely constricted in the middle, much
wider toward the end than at the base.
This genus is close to Gastrothrips and Cryptothrips. It agrees with
the former in the short head and prothorax, but differs in the large eyes,
short mouth cone, and fringes on the wing. It differs from Crypothrips in
the short head and prothorax, and the armed fore tarsi.
Type. Haplothrips orlando Watson and Osborn

The following species is described from eight females taken on wild
flowers at Dayton, Wyoming, by Wilson Bros. and sent to the author by
E. R. Sasscer of the Federal Horticultural Board.

Zygothrips wyomingensis n. sp-

Color from light mahogany to dark brown; fore tarsi light brown;
antennae concolorous with the body except segment 3 and the extreme base
of 4 which are light brown.
Measurements: Head, length .18 mm., width .195 mm.; prothorax,
length .14 mm., width .305 mm.; mesothorax, width .36 mm.; abdomen,
width .35 mm.; tube, length .155 mm., width at base .055 mm., at apex .028
mm.; antennae, length .32 mm.; segment 1, 23 microns; 2, 44; 3, 49; 4, 50; 5,
45; 6, 40; 7, 39; 8, 27. Total body length 1.3 mm.
Head a little wider than long, sides arched, abruptly rounded to the
eyes and slightly convergent posteriorly, faintly cross striated. Postocular
bristles minute or wanting. Eyes small, occupying about a fourth of the
length of the head and .4 the width. Ocelli large, posterior pair opposite
the anterior third of the eyes and continuous with their margins, the
anterior directed forward. Antennae less than twice the length of the
head. Sense cones and bristles very short and inconspicuous. Mouth cone
short, reaching .6 across the prosternum, bluntly rounded.
Prothorax shorter than the head, over twice as wide as long, sides
nearly straight but diverging sharply posteriorly, destitute of conspicuous
bristles as is the entire body. Pterothorax decidedly wider than the pro-
thorax, sides nearly straight and converging posteriorly. Wings long, their
membranes reaching to or extending beyond the base of the tube, tinged
with brown in the basal half or more. Fore pair heavily shaded at the
extreme base. Fore pair deeply constricted in the middle, fringed with
long hairs and with 8 or 9 interlocated ones on the posterior border. Legs
rather weak, concolorous with the body except the light fore tarsi. Fore
tarsi unarmed. Fore femora considerably enlarged.
Abdomen short, the length but little more than twice the width,
abruptly rounded posteriorly. Terminal bristles but little more than half
the length of the tube.

Bulletin 168, Thysanoptera of North America


BACK, E. A.,
'12. Notes on Florida Thysanoptera, with description of a new genus.
Ent. News, Feb. 1912.
'07. Proc. Hawaii Ent. Soc., 1907.
'08. Trans. N. H. Soc. Northumberland, Durham and Newcastle-on-
Tyne n. s. iii, pt. 1.
'08b. Ann. Mag. Nat. Hist., Ser. 8, Vol. 1.
'09. On Two New Genera of Thys. from Venezuela, J1. Linn. Soc.,
Zool. XXX, pp. 329-335.
'10. Extrait des Annales de la Soc. Ent. de Belgique, Tome 54.
'10b. Fauna Hawaii.
'10c. Cont. Towards a Knowledge of the Neotropical Thys.; J1. Linn.
Soc., Zool. XXX, pp. 369-387, Mar., 1910.
'11. Ter. Congr. Intern. d'Ent., Memoirs, pp. 283-288.
'12. Rec. Ind. Mus., Vol. VII, Pt. III, p. 258.
'12b. Ann. Mag. Nat. Hist., Ser. 8, Vol. X, pp. 220-222.
'13. Ann. Mag. Nat. Hist., Ser. 8, Vol. 12, Sep., 1913.
'14. Ann. Mag. Nat. Hist., Ser. 8, Vol. 13, Sep., 1914.
'14b. Jour. Econ. Biol., Vol. 9, p. 2.
'15. Linn. Soc. Jl., Zool., 32, p. 495-507. On a Collection of Thys.
from W. I.
'17. On a Collection of Thys. from St. Vincent, Jl. Zool. Res., Vol.
ii, No. 1, Mar., 1917.
'19. Brief Description of New Thys.-X-Ann. Mag. Nat. Hist., Vol.
4, No. 22.
'96. Proc. Iowa Acad. Sci., A, Vol. III, p. 214.
'08. Redia IV.
'09. Redia V, fasc. 2.
'09. Some Thys. from Mexico and the South, 1 Pomona Coll. Jl. Ent.,
Vol. 1, No. 4, pp. 109-119.
'09b. Some New Thysonaptera from So. Cal., do., pp. 100-108.
'09c. Notes on California Thysonoptera 1.-do. pp. 120-121.
'10. Thys. of So. Cal. II.-Pomona College Jl. Ent., Vol. 2, No. 1,
pp. 149-152.
'10b. New Thys. from Mexico and the South, 11-do. pp. 153-170.
'14. Mont. Bul. 98 and 12th An. Rep.
'04. New Cal. Thys.-Ent. News VII, p. 15, Nov., 1904.
'54. First Rep. Noxious Insects of the State of N. Y., p. 102.
'56. Third Rep. Noxious Insects of the State of N. Y., in An. Rep.
N. Y. State Agr. Soc., Vol. 16, p. 445.

Florida Agricultural Experiment Station

'08. On a collection of Thys. Insects from Barbados and St. Vincent
Is.-Proc. U. S. Nat. Mus., vol. 33, pp. 715-730.
'09. On Thys.-Ent. News, vol. 20, p. 228, May, 1909.

'01. Bul. Soc. Ent. France.

'93. Bul. 24, Col. Ag. Exp. Sta.
'36. An Epitome of the British Genera in the Order Thysanoptera,
with Indications of a Few of the Species-Ent. Mag., London, III,
pp. 439-451.
'52. List of the Specimens of Homopterous Insects in the Collection
of the British Museum, part IV, London Order III, Physapoda.
'02. Contribution to a Monograph Thys. N. A.-Proc. U. S. Nat. Mus.,
vol. 26.
'05. Proc. Biol. Soc., Wash., vol. 18.
'09. Ent. News, vol. 20, p. 249.
HooD, J. D.,
'08. New Genera and Species of Ill. Thys.-Bul. Ill., Sta. Lab. Nat.
Hist., vol. 8, art. 2, Aug., 1908.
'08b. Two New Species of Idolothrips.-Can. Ent., vol. 40, No. 9, pp.
305-309, Sept., 1908.
'08c. Two new species of Idolothrips.-Ann. Ent. Soc. Amer., vol.
1, No. 4, p. 284.
'08d. Three new N. A. Phloeothripidae.-Can. Ent., vol. 40, No. 9,
p. 305.
'09. Two New N. A. Phloeothripidae.-Ent. News, vol. 20, Jan.,
1909, pp. 28-32, p. 75.
'09b. Some Apparently New Thys. from Mich.-Ent. News, vol. 20,
pp. 220-231.
'09c. A New Genus and a New Species of N. A. Phloeothripidae.-
Ent. News, vol. 20, pp. 249-252.
'12. A New Genus and Three New Species of N. A. Thys.-Psyche,
vol. XIX, Aug., 1912, pp. 113-118.
'12b. Descriptions of New N. A. Thys.-Proc. Ent. Soc., Wash., XIV,
pp. 129-160.
'12c. Three New Phloethripidae (Thys.) from Texas and Michigan.-
Proc. Biol. Soc., Wash., vol. 25, pp. 11-16.
'12d. On N. A. Phloethripidae (Thys.) with Description of Two New
Species.-Can. Ent., vol. XLIV, pp. 137-144.
'12e. Proc. Biol. Soc., Wash., vol. XXV, pp. 64, 61-76.
'13. A New Species of Heliothrips (Thys.) from Maryland and Illi-
nois.-Can. Ent., pp. 308-311, Sept., 1913.
'13b. Nine New Thys. from the U. S.-Proc. Biol. Soc., Wash., vol.
26, pp. 161-166.

Bulletin 168, Thysanoptera of North America 85

'13c. On a Collection of Thys. from Panama.-Psyche, vol. XX, pp.
'13d. Two New Thys. from Porto Rico.-Insec. Insc. Menst., vol. I,
No. 6.
'13e. On a Collection of Thys. from Porto Rico.-do., vol. 1, No. 12,
pp. 149-154.
'14. Notes on N. A. Thys.-Insec. Insc. Menst., vol. II, No. 2, Feb.,
'14b. Two Porto Rican Thys. from Sugar Cane.-do., vol. II, No. 3,
Mar., 1914.
'14c. Studies in Tubiliferous Thys.-Proc. Biol. Soc., Wash., 27, pp.
'14d. On the Proper Generic Names for Certain Thys. of Economic
Importance.-Proc. Ent. Soc., Wash., vol. 16, pp. 34-44.
'14e. Prosopothrips cognatus, a New N. A. Thys.-Can. Ent., vol.
46, No. 2, pp. 57-59.
'14f. Two New Thys. from Panama.-Insec. Insc. Menst., vol. II,
No. 4.
'15. On Some Am. Aeolothripidae.-Ent. News, vol. XXVI, p. 162,
April, 1915.
'15b. An Outline of the Subfamilies and Higher Groups of the Order
Thys.-Proc. Biol. Soc. Wash., vol. 28, pp. 49-60.
'15c. Desc. New Am. Thys.-Insec. Insc. Menst., vol. III, Nos. 1-4.
'15d. An Interesting Case of Antennal Antigeny in Thys.-Pro-. Ent.
Soc. Wash., vol. XVII, no. 3.
'15e. Two New Species of Liothrips (Thys.).-Bul. Brooklyn Ent.
Soc., vol. X, no. 4, Oct., 1915.
'16. Desc. of New Thys.-Proc. Biol. Soc. Wash., vol. 29, pp. 109-124.
'16b. A New Species of Heterothrips from U. S.-Ent. News, vol.
27, no. 3.
'16c. A New Plectothrips from Jamaica.-Insec. Insc. Menst. IV, nos.
7-9, p. 78.
'16d. Oedaleothrips hookeri, a New Genus and Species of Thys.-
Brooklyn Ent. Soc., vol. II, no. 3, pp. 64-65.
'17. An Annotated List of the Thys. of Plummers' Island, Md.-
Insec. Insc. Menst., vol. V, nos. 4-6.
'18. New Species of Thys. from Australia.-Memoirs of Queensland
'19. On Some New Idolothripidae.-Insec. Insc. Menst., vol. VII,
nos. 4-6.
HOOD (J. D.) and WILLIAMS (C. B.),
'15. New Thys. from Fla. and La.-J1. N. Y. Ent. Soc., vol. 23, no.
2, June, 1915.
'07. The Tobacco Thrips. U. S. Dep. Ag., Bul. 65.
'94. Thysanoptera Nova, Term. Fuz. XVII, p. 2.
'22. A new genus and two new species of Thysanoptera from British
East Africa.-Memoirs of the Moscow Museum.

Florida Agricultural Experiment Station

'12. Some New Cal. and Ga. Thys., U. S. Dep. Ag., Bur. Ent., Bul.
23, pt. 1, Tech. Ser.
'12. Revision der von Serville Aufgestellen Thys. Genera.-Zool. An-
nalen, 1912.
'12b. Synopsis der Megathripidae (Thys.).-Zeitschr. wiss. Ins. Biol.,
Beilage 1, pp. 105-110.
'12c. Zwei neue Javinische Physapoden-Genera.-Zool. Anzeiger Bd.
-XL, Nr. 10-11.
'14. Beitrage zur. Thys. des. Mediterrangebietes.-Vehr. der K. K.
Zool.-bot. Gesedsch in Wien.
'20. Die exotischen Tubiliferen (Thys.) des Deutschen Ent. Museum.
-Ent. Mitteilungen, Band IX.
'20b. Acta Soc. Ent. Cech., XVII.
'21. Zur Systematik der Orthoptereiden Insecten.-Treubia, vol. 1.
'21b. Beitrage zur Malayischen Thysanopterenfauna.-Treubia, vol.
1, livr. IV.
'21c. Ergaenzung zu Priesner's Haplothrips-Studiren die Australisch-
en Haplothripinen.-Treubia, vol. II, livr. 1.
KELLY, E. O. G.,
'15. A New Wheat Thrips.-JI. Agr. Research, Dept. Agr. IV, 3.
'88. Die Schadl. Insekten d. Tabak in Bessarabien.-Bul. Soc. Imp.
Nat. Moscow, no. 1, pp. 10-77.
'22. A New Cryptothrips from Florida.-Ent. News, vol. XXXIII,
no. 7, pp. 193-9.
'20. Annotated List of the Injurious and Beneficial Insects of the
Avocado in Florida.-Fla. Buggist, vol. III, no. 3, Jan., 1920,
pp. 45-48.
'13. New Genera and species of Thys. with Notes on Distribution
and Food Plants.-Proc. U. S. Nat. Museum, XLVI, pp. 1-55.
'07. Contribution to our knowledge of the Thys. of Cal.-U. S. Dep.
Agr., Bur. Ent., Tech. Ser., Bul. 12, pt. III.
'08. The Orange Thrips.-do. pt. VII.
'11. Synopsis Cat. and Bibl. of N. A. Thys.-U. S. Dep. Agr., Bur.
Ent., Tech. Ser., Bul. 21.
'83. Notes on Thripidae, with Descriptions of New Species.-Can.
Ent., vol. XV, p. 151.
'88. Report U. S. Dep. Agr., 1888.
'88b. The Food Habits of the Thripidae. Insect Life, 1888, p. 137.
'95. Notes on a New Species of Phloeothrips with Description.-Proc.
Iowa Acad. Sc., 1895, p. 228.

Bulletin 168, Thysanoptera of North America

'98. The Strawberry Thrips and the Onion Thrips.-Fla. Agr. Exp.
Sta., Bul. 46.
'09. The Greenhouse Thrips.-U. S. Dep. Agr., Bur. Ent., Bul. 64,
pt. VI.
'21. De Cacaothrips.-Dept. Landb. Suriname, Bul. no. 44.
'12. Notes on Thys.-Proc. Ent. Soc., Wash., vol. XIV, p. 13.
'12b. The Red-banded Thrips.-U. S. Dep. Agr., Bur. Ent., Bul. 99,
pt. II.
'12c. The Bean Thrips.-U. S. Dep. Agr., Bur. Ent., Bul. 118.
'09. Some Apparently New Thys. from Mich.-Ent. News, vol. 20,
pp. 220-228.
'14. Biology of the Thys.-The Am. Nat., vol. XLVIII, pp. 161-176,
'18. Notes on Aeolothripidae.-Proc. Ent. Soc., B. C., no. 12.
'19. Notes on Thys. from British Columbia.-Can. Ent. LI, pp.
'96. Einige neue oder unvollstandig beschreibene Blassenfusse (Phys-
apoda).-Opv. Vet. Akad. Turh., no. 8, pp. 613-626.
'12. Ent. Tijdskrift.
'95. Monographie Radu "Thysanoptera."
'13. New Thys. from Fla.-Ent. News, vol. XXIV, pp. 145-148.
'13b. An Unusual Type of Injury Due to a Thrips.-Jl. Ecom. Ent.,
vol. 6, no. 5, pp. 413-15.
'15. New Thys. from Florida II.-Ent. News, vol. XXVI, pp. 49-52.
'16. New Thys. from Fla. III.-Ent. News, vol. XXVII, pp. 126-133.
'18. Thys. of Fla.-Fla. Buggist, vol. I, no. 4.-vol. II, no. 1, p. 53.
'19. New Thys. from Fla. IV.-Fla. Buggist, vol. II, no. 3, p. 97.
'19b. Additions to the Thys. of Fla. VI.-Fla. Buggist, vol. III, no.
1, pp. 2-7.
'19c. A New Physothrips from Oregon, Fla. Buggist, vol. III, no.
2, p. 32.
'20. An Apparently new Haplothrips from Cuba.-Fla. Ent., vol.
IV, no. 1, pp. 7, 12.
'20b. New Thys. from Fla.-VII.-Fla. Ent., vol. IV, nos. 1-2.
'21. New Thys. from Fla.-VIII.-Fla. Ent., vol. IV, no. 3, p. 35.
'21b. New Thys. from N. Y.-Bul. Brooklyn Ent. Soc. XVI, nos. 3-4.
'22. New Thys. from Fla.-IX.-Fla. Ent., vol. V, no. 4, pp. 65-66.
'22b. Another New Thrips from Cocoanuts from Cuba.-Fla. Ent.,
vol. V, no. 3, p. 66.
'22c. Another Camphor Thrips.-Fla. Ent., vol. VI, no. 1, pp. 6-'.

38 Florida Agricultural Experiment Station

'22d. Additions to the Thys. of Fla.-X.-Fla. Ent., vol. VI, no. 2,
pp. 21-23.
'22e. On a Collection of Thys. from Rabun Co., Ga.-Fla. Ent., vol.
VI, no. 3.
'22f. A New Thrips from Citrus in Alabama.-Fla. Ent., vol. VI, no.
3, pp. 45-46.
'23. Additions to the Thys. of Florida.-Fla. Ent., vol. VI, no. 4.
'23b. The Proper Name and Distribution of the Florida Flower
Thrips.- Fla. Ent., vol. VII, no. 1, pp. 9-11.
'19. New Thys. from Fla.-V.-Fla. Buggist, vol. II, no. 4, pp. 116-119.
'13. On Two New Species of Thys. from the West Indies.-J1. Econ.
Biol., vol. 8, pp. 209-215.
'16. Rep. Dept. Ag., St. Vincent, 1915-1916.
'17. A New Thrips Damaging Orchids in the West Indies.-Bul. Ent.
Res. VIII, no. 1, pp. 59-61.

(Numbers refer to those preceding the species. Those in bold faced type
indicate the most common species of thrips found on that plant. Franklinlella
tritici and its varieties are found in practically all blossoms and have been omitted
from this list.)

Abies, 321
Acacia farnesiana, 290, 294
Acer. (cf. Maple)
Achillea millefolium, 224
Adenostoma fascilatum, 13, 84
Adicea, 67
Californica, 46, 110
pavia, 29
Agave, 3
Alfalfa, 75, 139
Allium (cf. Onion)
Almond, 82, 107
Amaryllis, 76
Amelanchier, 5, 49, 107
Andromeda, 107
Anthemis cotula, 125
Apple, 75, 107, 121, 165, 185, 224, 240
Apricot, 107, 214, 273
Aralia, 76, 77
Arbutus Menziesii, 4
dracontium, 23
tryphyllum, 23
Arrowroot, 103
Artemesia, 15
Artichoke, 257
Arum, 76
Arundinaria tecta, 330
Aspidium, 68
Aster, 99, 105
Atalaya hemiglauca, 172
Avocado, 68, 82, 210
Azalea, 68, 245
nudifiora, 29, 134

Bamboo, 43, 152, 222, 255
Banana, 76
Barberry (cf. Berberis)
Baptisia tinctoria, 50
Basswood (cf. Tilia americana)
Bay (cf. Tamala and Magnolia
Bean, 67, 74, 75, 83, 92, 103
lima, 103

velvet (cf. Stizilobium)
Beets, 75, 76
Begonia, 76, 105
Berberis, 107
Bidens, 232
Bindweed, 7
Birch, 333
Blackberry, 83
Bromelid, 154
Broom-sedge, 84, 262, 264
Brunella vulgaris, 7
Brysonima crassifolia, 25, 31
Buckeye (cf. Aesculus)
Buttercup, 84

Camphor, 307, 308
Cane, sugar, 43, 95, 228, 259
Cacao, 20, 82, 153, 156, 329
Carica (cf. Papaya)
Carissa, 103
Carnations, 123
Caryota, 76
Carrot, wild, 39, 124
Cashew, 82
Cassia, 7, 67, 75, 76, 103, 254
Cassava, 36, 86
Catalpa, 82, 93
Cat tail, 104
Cattleya, 109
Ceanothus, 5, 6, 49, 117
thyrsiflorus, 13
Cedar, 115, 176, 321
Celtis, 49, 165
Celosia, 232
Cercis canadensis, 85
Cestrum, 76
Chamaedora, 76
Chamisal (cf. Adenostoma fascila-
Chenopodium, 76
Chestnut, 201
Cherry, 84, 107, 188
Jerusalem, 102
Chionanthus virginica, 93, 105
Chrysanthemum, 76

Florida Agricultural Experiment Station

Citrus, 2, 58, 59, 63, 68, 75, 83, 89,
101, 103, 161, 220, 234, 237, 284,
Clematis, 49, 120
Clover, 39, 49, 143, 174
bur, 75
Cocoanuts, 68, 223, 233, 236, 329
Coleus, 68
Compositae, 86, 93, 103, 124, 244
Conifer, 16
Convolvulus, 103
Corn, 7, 8, 14, 58, 95, 104, 115, 139,
224, 249
florida, 65, 207
stolonifera, 61
Cotoneaster, 76
Cotton, 49, 73, 75, 76, 85, 98, 132
Cottonwood, 177
Crataegus, 49
Cress, Water (cf. Nasturtium of-
Crimum, 76
Croton, 68
Cucumber, 49, 76
Cudweed (cf. Gnaphalium)
Currant, 200
Cycas revoluta (cf. Palm, Sago)
Cyperus, 115

Dahlia, 68
Daisy, 107
Dandelion, 85, 107, 114, 117
Daucus, 39, 124
Dewberry, 85
Dodder, 232
Dogwood (cf. Cornus florida)
Dolostoma, 76
Dracaena, 76, 77
Dragon, Green, (cf. Arisaema dra-

Elderberry (cf. Sambucus)
Elm, 49, 83, 174, 175, 180
Elymus condensatus, 9
Eranthemum, 76
Eriogonum nudum, 238
fasciculatum, 301, 302
Erythrina, 103
Erythronium, 120

Eucharis, 76
Eugenia, 82, 295
Eupatorium serotinum, 231

Fern, 68, 76
Festuca ovina, 42
pratensis, 47
Ficaria, 108
Ficus, 76, 77, 156, 304
Fig, 107, 129
Fir, Douglas, 107
Flamboyant, 103
Fringe Tree (cf. Chionanthus)
Fungus, 161, 162
(cf. mushroom, Polyporus)

Garcinia, 68
Gardenia, 76
Geranium, Indian, 27
Gleditschia triacanthos, 17
Gnaphalium, 85
Gooseberry, 200
Grape, 27, 32, 76, 107, 173, 207, 268,
Grape, 27, 32, 76, 107, 173, 207, 268,
54, 55, 56, 58, 67, 71, 72, 78, 84,
85, 96, 103, 104, 113, 115, 131,
138, 139, 143, 147, 148, 149, 163,
168, 173, 174, 180, 204, 224, 226,
227, 241, 247, 257, 262, 263, 285,
293, 311, 314
Bermuda, 41, 69, 217, 251
Old Witch (cf. Panicum capillare)
Fox-tail (cf. Setaria)
Para (cf. Panicum barbinode)
Goldenrod (cf. Solidago)
Guava, 34, 68, 80, 82

Hackberry (cf. Celtis)
Hawthorn (cf. Crataegus)
Helenium, 30
Helianthus, 84, 97, 119
Heteromeles arbutifolia, 205
Hibiscus, 68
Hickory, 17, 121, 151, 165, 194, 195,
207, 312
Honeysuckle, 23 (cf. Azalea)
Hop, 83
Hop-tree (cf. Ptelea trifoliata)
Huisache, 290, 294

Bulletin 168, Thysanoptera of North America

Hura crepitans, 297, 298
Hydrangea, 76
Hydrophyllum virginicum, 16, 122
Hypericum dolobriforme, 272

Impatiens, 118
Indigo, Wild, (cf. Baptisia tinctoria)
Inga, 82, 258
Ipomoea, 150
Ironweed, (cf. Vernonia)
Ivy, Poison, 32

Jack-in-the-Pulpit (cf.
Japonica, 68
Juniperus (cf. cedar)
Juniper, 62, 83

Kalmia latifolia, 61, 85
Kola, 82
Kudzu, 7, 74
Kentia belmoraena, 77

Labiatae, 87
Lactuca, 130


Laurel, Cal, (cf. Umbellularia)
Mt. (cf. Kalmia)
Lantana, 103
Leaves, fallen, 320
Lettuce, 75
wild (cf. Lactuca)
Lilac, Cal. (cf. Ceanothus thyrsi-
Lily, 76
Linden (cf. Tilia)
Liriodendron tulipifera, 73
Locust, Honey (cf. Gleditschia tri-
Locust, yellow (cf. Robinia pseu-
Lotus glaber, 75
Lupine, 51, 57, 103, 136
purple, 13
Lyonia mariana, 26
Lysichiton, 107

Madrona, 117
Magnolia, 68
glauca, 126
grandiflora, 67, 126

Malpighiaceae, 21
Mammee Apple, 82
Mandrake, 81
Mango, 68, 82, 92, 223, 230, 286
Manzanita manzanita, 4
Maple, 68, 107, 173, 180, 184, 270,
Mangosteen, 68
Masset, 57
Mayweed, (cf. Anthemis cotula)
Melanthera deltoidea, 232
Milium, 131
Millet (cf. Milium)
Mimosa, 222
Mimulus, 64, 116
Mina lobata, 76
Monardella lanceolata, 84
Monkey Flower (cf. Mimulus)
Moonflower, 76
Moringa oleifera, 172
Moss, 118, 193, 211
Spanish, 222, 255
Mullein, 173, 249
Muscari racemosum, 120
Mushroom, 151
Mustard, 85, 214

Nance tree (cf. Brysonima crassi-
Nasturtium officinale, 12
Nicotina (cf. Tobacco)
Night-shade, 63
Nut, ground, 103

Oak, 151, 165, 173, 177, 180, 185, 190,
198, 199, 203, 206, 207, 235, 246,
284, 289, 292, 333
Live, 82, 255
Red, 160
Runner, 179, 218
White, 248, 315, 331
Oats, 7, 27, 47, 85
wild, 46
Olive, 60
Onions, 7, 8, 11, 45, 47, 85, 123, 124
Opuntia, 260, 261
Orange (cf. Citrus)
Orchids, 108, 109
Ostrya virginiana, 203, 231

Florida Agricultural Experiment Station

Palm, 108
royal, 68, 76
sago, 77, 255
Pandanus, 76
Panicum, 7
barbinode, 259
capillare, 45
Passiflora, 80
Papaya, 36, 78
Paulonia imperialis, 277
Pawpaw, 103, 132, 271
Peach, 75, 107, 111, 166, 188, 303,
Peanuts, 85
Pear, 75, 84, 107
Pea, 75
Pepper, 103
Petalostemon purpureum, 94
Phaseolus, 74
Phlox, 68
Phoenix, 76
Phymotodes, 76
Pimento, 267
Pine, 75, 145, 146, 221, 242, 283,
315, 321
Pinks, 68
Pinkneya pubens, 128
Plantago, 7, 53, 85, 135, 224, 330
Plum, 107, 224
hog, 82
Poa proatensis, 42
Poke-weed, 67
Polymnia, 67, 132
Poplar, 75, 185, 187
Privet, 43, 319
Prune, 84, 107, 113, 214
Prunus, 80, 107, 188
Psidium (cf. Guava)
Ptelea, trifoliata, 52
Polygonum (cf. Smartweed)
Polyporus, 180
Poplar, 158, 159, 180
Poppy, 114
Potato, 76, 92, 103
sweet, 76, 103
Pyrol, Woolly, 103
Pyrus, 107 (cf. Pear)

Quamasia, 85
Quercus (cf. Oak)

Randia tomentosa, 172
Red-bud (cf. Cercis canadensis)
Rhamnus, 103
crocea, 84
purshina, 2
Rhododendron ulmiflorum, 23
Richardia, 76
Rose, 35, 82, 87, 103, 231
Robinia pseudacacia, 17, 162
Rubus, 80
Rudbeckia, 224
Rushes, 222, 227, 239
Rudabaga, 7, 224
Robinia pseudacacia, 17, 162
Rye, 47, 139
grass, 215
western (cf. Elymus condensa-

Salix, 103, 151, 165, 173, 175, 177,
180, 181, 191, 269, 271, 274, 279,
289, 291, 300, 306, 315, 333
fluviatalis, 22
nigra, 105
Sambucus, 48, 170, 202
glauca, 13, 84
Sassafras, 209
Saxifraga, 124
Scirpus, 239
Sedge, 226 (cf. Cyperus)
Senecio, 105
Setaria viridis, 46
Shepherd's purse, 85
Sida hederacea, 28
Silphium, 132
Skunk-cabbage (cf. Lysichiton)
Smartweed, 49
Smilax, 32
Snake weed, 142
Snapdragon (cf. Impatiens)
Solanum, 86, 124
Solidago, 59, 252, 330, 333
Sorrell, 85
Sour sop, 329
Spice bush, 197
Sphaeralcea cuspidata, 28, 196
Spinach, 76
Spirea discolor, 224
Spondia, 82
Stizilobium, 103, 137

Bulletin 168, Thysanoptera of North America

Sumach, 257
Sunflower, (cf. Helianthus)
Sycamore, 175, 180, 188, 268, 289, 315
Tamala, 308
Tea, 231
Terminalia, 82
Thistle, 63
Tilia americana, 33, 85, 207, 331
Tobacco, 37, 86, 232
Tomato, 79, 89, 224, 232
Touch-me-not, 67
Trilium, 81, 190
Trumpet creeper, 165
Tulip-tree (cf. Liriodendron tulip-
Turnip, 85
(cf. rudibaga)
Indian (cf. Arisaema triphyllum)

Ulmus (cf. elm)
Umbellularia californica,
Uriesia, 186

Aphids, 299
General, 10, 16, 316
Leaf-hoppers, 18
Mites, 243, 299
Scales, 286, 288
barnacle, 219

6, 117, 167

Verbascum, 249
Vernonia, 7, 132, 229
Vetch, 75
Viburnum, 107, 207, 289
acerifolium, 93
alnifolium, 300
Violet, dog-tooth (cf. Erythronium)

Walnut, black, 193
English, 107
Water-leaf (cf. Hydrophyllum)
Wheat, 78, 140
Willow (cf. Salix)
Wood, white, 103

Yams, 103
Yarrow, 84
Yucca, 174, 216

Ziziphus mauritiana, 172

camphor, 317
red, Florida, 220
Spiders, Red, 83
Thrips, 299
Onion, 7, 11
Whiteflies, 18, 288


(Italics indicate syonyms or groups not represented in North America.)

Acanthothrips, 16, 51
albivittatus, 52
beach, 52
cortices, 52
doanei, 52
karnyi, 52
magnafemoralis, 52
nodicornis, 52
Actinothrips, 24
Aeolothripoidea, 6
Aeolothripidae, 6, 8
Aeolothripinae, 8, 9
Aeolothrips, 9, 25
albicinctus, 26
annectans, 26
auricestus, 26

bicolor, 26
crassus, 27
fasciatus, 26
floridensis, 27
kuwanaii, 27
longiceps, 27
nasturtii, 26
vespiformis, 27
vittipennis, 27
Agerothrips, 14
Agnostochthona, 20
Aleurodothrips, 20, 66
fasciapennis, 66
Allothrips, 20, 66
megacephalus, 66
Amblythrips, 14

Florida Agricultural Experiment Station

Anactinothrips, 24
Androthrips, 20
Aneurothrips, 14
Anaphothrips, 14, 46
albus, 33
arizonensis, 46
cameroni, 46
grandioculus, 46
longipennis, 33
obscurus, 46
secticornis, 46
striatus, 46
tricolor, 33
virgo, 46
zeae, 33
Ankothrips, 9, 25
robustus, 25
Anthothrips, 58
dozieri, 60
flavipes, 60
floridensis, 61
gowdeyi, 60
niger, 59
nigricornis, 60
variabilis, 60
verbasci, 61
Apterothrips, 10, 32
subreticulata, 32
Aptinothripinae, 10, 14
Aptinothrips, 14, 46
rufus, 46
Arrhenothrips, 16
Astrothrips, 11
Australothrips, 11
Austrothrips, 19

Bacillothrips, 24
Bactrothripinae, 24
Bagnelliella, 17, 56
yuccae, 56
Baliothrips, 13, 44
basalis, 44
Barythrips, 20, 66
brevitubus, 66
sculpticauda, 66
Belothripinae, 10, 14
Belothrips, 14
Bolacothrips, 3
Brachythrips, 19

Bregmatothrips, 14, 46
gracilis, 46
venustus, 46

Caudaothrips, 24
Cecidothrips, 19
Cephalothrips, 17, 56
elongata, 57
errans, 56
monilicornis, 56
yuccae, 56
Ceratothripidae, 7
Cercothrips, 23
Chilothrips, 14, 46
pini, 46
Chirothripinae, 9, 10
Chirothripoididae, 8, 24
Chirothrips, 10, 29
antennatus, 30
crassus, 30
floridensis, 30, 76
floridensis catchingsi, 30, 76
insolitus, 30
longipennis, 30
manicatus, 30, 76
mexicanus, 30
obesus, 30
spiniceps, 30
vestis, 30
Chirothripoides, 24, 73
typicus, 73
Chromatothrips, 22
Compsothripinae, 16
Corynothripinae, 9, 10
Corynothrips, 10, 29
stenopterus, 29
Craniothrips, 18, 63
urichi, 63
Cranothrips, 9
Crichothrips, 12
Cryptothripinae, 15, 18, 20
Cryptothrips, 21, 22, 69
adirondacks, 68
aspersus, 68
bicolor, 70
californicus, 68
carbonarius, 70
citri, 60
collaris, 70

Bulletin 168, Thysanoptera of North America

exiguus, 69
fasciapennis, 66
floridensis, 70
gilvipes, 70
junctus, 70
laureli, 70
longiceps, 70
pini, 61
rectangularis, 70
salicis, 69
Ctenothrips, 4, 11, 36
bridwelli, 36
floridensis, 5, 36
reticulatus, 4, 36

Dendrothrips, 10
Dermothrips, 23
Desmothrips, 9
Dicaiothrips, 23, 71
angusticeps, 72
armatus, 73
brevicornis, 72
champion, 71
distinctus, 72
foveocollis, 72
grandis, 72
laevicollis, 72
tuberculatus, 73
Diarthrothrips, 13
Diceratothrips, 21, 67
harti, 67
longiceps, 67
picticornis, 67
Dichaetella, 11
Dichaetothrips, 21, 67
williamsi, 67
Dictyothrips, 5, 11
floridensis, 4, 36
reticulatus, 4, 36
Dinurothrips, 11, 15, 47
hookeri, 47
Docessissophothripinae, 15
Dolerothrips, 19
Dolicothrips, 4, 17, 57
elongate, 57
Drepanothrips, 13

Ecacanthothripidae, 7
Echinothrips, 11, 33
americanus, 34
mexicanus, 34

Elaphrothrips, 23, 73
longiceps, 73
Euchaetothrips, 13
Eumorphothrips, 19
Euplothrips, 20
Eupathithripidae, 7, 15
Eupathithrips, 15, 16, 46
affinis, 46
silvestri, 47
Erythrothrips, 8, 25
arizonae, 25, 75
durango, 74
Eurhyncothrips, 16, 19
Eurythrips, 19, 63
ampliventralis, 63
hindsi, 63
longilabris, 63
osborni, 63
Euthrips, 19, 36, 45
albus, 42
cameroni, 46
cephalicus, 38
citri, 33
costalis, 42
ehrhornii, 42
floridana, 45
floridense, 39
fuscus, 38
gossypii, 40
grandioculus, 46
helianthi, 40
insularis, 40
longirostrum, 45
nervosa, 40
nicotinae, 38
obscurus, 46
occidentalis, 39
orchidi, 42
parvus, 33
pyri, 41
runner, 40
seticornis, 46
tritici, 39
ulcis californicus, 45
Frankliniella, 12, 36
albus, 42
annulipes, 40
auripes, 40
black, 42
cephalica, 38

Florida Agricultural Experiment Station

cephalica masoni, 39
cephalica reticulata, 39
citripes, 40
costalis, 42
ehrhornii, 42
fusca, 38
gossypii, 40
helianthi, 40
insularis, 40
maidis, 40
melanommatus, 38
minute, 38
nervosa, 40
occidentalis, 39
orchidi, 42
runner, 40
stylosa, 39
tenuicornis, 39
tritici, 39
tritici bispinosa, 39
tritici californica, 39
tritici moultoni, 39
tritici projects, 39
varicorne, 39
williamsi, 39
Franklinothrips, 9
tenuicornis, 27
vespiformis, 27, 44

Gastrothrips, 20, 66
ruficauda, 66
salicis, 67
texanus, 67
Glaucothrips, 12
Glyptothrips, 20, 23, 66
flavescens, 66
Gigantothrips, 23, 71
coniferarum, 71
flavipes, 71
fuscus, 71
Gnophothrips, 17, 56
megaceps, 56
Gymnothrips, 19
Gynaikothrips, 22, 68
uzeli, 68

Haplothripinae, 15, 17, 18
Haplothrips, 15, 16, 18, 58
angustipennis, 61
bellus, 60
cassiae, 62

citri, 60
cubensis, 60
dozieri, 60
faurei, 61
flavipes, 60
funki, 60
gowdeyi, 60
gracilis, 60
graminis, 61
haliophilus, 61
harnedi, 60
humilis, 61
jonesi, 60
leucanthemi, 59
malifloris, 61
merrilli, 60
nubilipennis, 61
oneco, 60
orlando, 67, 81
pini, 61
querci, 61
rabuni, 60
ruber, 61
statices, 58, 59
tibialis, 60
verbasci, 61
Heliothripinae, 9, 11
Heliothrips, 11, 34
cinctipennis, 35
fasciapennis, 35
fasciatus, 35
femoralis, 35
haemorrhoidalis, 34
marginipennis, 35
phaseoli, 35
punctipennis, 35
rubrocinctus, 36
striatus, 35
Heterothripidae, 6, 9
Heterothrips, 9, 27
aesculi, 29
analis, 29
arisaemae, 28
auranticornis, 29
azalae, 29
borinquen, 29
decacornis, 28
flavicornis, 29
lyoniae, 29
mexicanus, 29, 75

Bulletin 168, Thysanoptera of North America

minor, 29
pectinifer, 29, 76
salicis, 28
sericatus, 29
silvestra, 47
tiliae, 29
vitis, 29
Hindsiana, 18, 57
catchingsi, 57, 80
cocois, 58
melaleuca, 58
pini, 57
Histricothripidae, 8
Holothrips, 20
Homothrips, 13
Hoodia, 22
Hoplandrothrips, 16, 49
armiger, 50
brunneicornis, 51
funebris, 51
insolens, 51
jennei, 50
juniperinus, 51
mcateii, 51
microps, 50
pergandei, 50
quercuspumilae, 51
raptor, 51
russelli, 51
uzeli, 51
xanthopoides, 51
xanthopus, 51
Hoplothrips, 21, 51
albivittatus, 52
beach, 52
cortices, 52
karnyi, 52
karnyi major, 52
Holopothrips, 21, 67
signatus, 67
tenuis, 68
Horistrothrips, 16
Hydatothrips, 10
Idolimothrips, 13
Idolothripidae, 8, 23
Idolothrips, 4, 24
angusticeps, 72
armatus, 73
coniferarum, 71
foveicollis, 72

flavipes, 71
fuscus, 71
longiceps, 73
tuberculatus, 73
Iniothrips, 16
Isoneurothrips, 13

Kakothrips, 12
Karnyia, 4, 70
Karnyothrips, 4, 23, 70
weigeli, 70
Kladothripinae, 15
Kleothrips, 24
Klinothrips, 23

Leptogastrothrips, 16
Leptothrips, 18, 21, 68
adirondacks, 68
asperus, 68
fasciculatus, 68
fasciculatus stenoceps, 68
flavicornis, 69
mali, 68
russelli, 68
Leucothrips, 14
Limothrips, 10, 31
angulicornis, 31
avenue, 31
cerealium, 31
setariae, 31
Liophloeothrips, 16, 53
modestus, 53
Liothripinae, 15, 16
Liothrips, 16, 53, 70
bakeri, 69
bibbyi, 55, 80
brevicornis, 56, 80
caryae, 55
caryae floridensis, 55
castanea, 55
citricornis, 56
flavoantennis, 56
fuscus, 55
ilex, 55
ilex dumosa, 55
leucogonis, 55
macconelli, 68
montanus, 55
ocellatus, 54, 79
perseae, 56
sambuci, 55

Florida Agricultural Experiment Station

umbripennis, 55
umbripennis mexicanus, 55
varicornis, 55
zeteki, 56
Lispothrips, 19
Lissothrips, 17, 56
muscorum, 56
Lithadothrips, 8

Macrothripinae, 1.6
Macrurothrips, 16
Malacothrips, 16, 48
modestus, 49, 53
zonatus, 49
Mecothrips, 13
Mecynothrips, 23
Melanthripinae, 8, 9
Melanthrips, 9
Megalomerothrips, 23, 70
eupatorii, 70
Megalurothrips, 14
Megalothrips, 24, 73
hesperus, 73
spinosus, 73
Megathripinae, 24
Megathripidae, 8, 24
Megathrips, 24
Merothripidae, 7
Merothrips, 15, 47
fusciceps, 47
morgani, 47
Mesothrips, 19, 22
ficorum, 68
uzeli, 68
Microcanthothrips, 20
Microthrips, 13, 44
pierce, 44
Mitothrips, 9, 27
petulans, 27
Monochaetella, 10
Mycterothripinae, 10, 13
Mycterothrips, 13, 45
floridana, 45
longirostrum, 41, 45
Myrmecothrips, 57
querci, 57
Neoeurhynchothrips, 16, 52, 77
cubensis, 52, 78
Neoheegeria, 17, 18, 61
verbasci, 61

Neophysopus, 14
Neothrips, 17, 56
cortices, 56
Odontinothrips, 16
Odontothrips, 13, 45
phaleratus, 45
pictipennis, 45
ulicis californicus, 45
Oedaleothrips, 17, 22, 57
hookeri, 57
querci, 57
Oedemothrips, 20
Opthalmothrips, 23
Orothripinae, 8
Orothrips, 9, 25
kellogii, 25
kellogii yosemitii, 25
Oxythrips, 14, 46
divisus, 46

Pactothrips, 66
flavescens, 66
Palaethrips, 9
Panchaetothripidae, 6, 15
Panchaetothrips, 15
Parafrankliniella, 12
Parthenothrips, 11, 35
dracaenae, 35
Paulothrips, 21
Perissothrips, 14
Pezothrips, 13
Phibalothrips, 11
Phloeothripoidea, 7
Phloeothripidae, 8, 15
Phloeothripinae, 15, 16
Phloeothrips, 16, 48, 49
armiger, 50
bicolor, 70
caryae, 55
drakei, 48
ficorum, 69
floridensis, 48
jenneri, 50
longitubus, 69
maculatus, 48
mali, 68
niger, 59
ornatus, 48
pergandei, 50
raptor, 51

Bulletin 168, Thysanoptera of North America

uzeli, 51
verbasci, 61
vittatus, 48
Phoxothrips, 23
Phpllothrips, 55
citricornis, 56
fasciculatus, 68
fasciculatus stenoceps, 68
umbripennis, 55
Physothrips, 12, 41
albus, 42
black, 42
costalis, 42
ehrhornii, 42
funestris, 42
orchidii, 42
xanthius, 42
Platythrips, 10
Plectrothrips, 19, 63
antennatus, 64
pallipes, 64
Plesiothrips, 13, 42
perplexus, 42
Podothrips, 18, 63
semiflavus, 63
Poecilothrips, 17
Polyommatothrips, 47
silvestri, 47
vigilans, 48
Polyphemothrips, 23, 71
corticis, 71
tibialis, 71
Porphyrothrips, 21
Proscirtothrips, 10, 32
Prosopothrips, 11, 35
cognatus, 35
Pseudanophothrips, 14
Pseudocriptothrips, 21
Pseudodendrothrips, 10
Pseudothrips, 12, 40
inaequalis, 41
spadix, 41
Pterothrips, 11
Pygothripidae, 7, 15
Pygothrips, 15
Retithrips, 11
Rhaebothrips, 21
Rhamphothrips, 13
Rhaphidothrips, 14, 47
fuscipennis, 47

Rhaptothrips, 72
peculiaris, 72
Rhipidothrips, 9
Rhipiphorothrips, 11
Rhopalothrips, 18, 63
bicolor, 63
Rhynchothrips, 16, 52
buffae, 53
dentifer, 53
pruni, 53
salicarius, 53
tridentatus, 53
Scirtothrips, 10, 12, 32
albus, 33
brevipennis, 33
citri, 33
longipennis, 33
niveus, 33
parvus, 33
ruthveni, 33
tricolor, 33
zeae, 33
Scolothrips, 11, 36
sexmaculatus, 36
Scopaeothrips, 18, 63
unicolor, 63
Sedulothrips, 15, 47
hubbelli, 48, 76
insolens, 48
vigilans, 48, 77
Selenothrips, 11, 36
rubrocinctus, 27, 36
Sericothripinae, 9, 10
Sericothrips, 10, 31
albus, 31
apteris, 32
baptisiae, 32
cingulatus, 32
moultoni, 32
pulchellus, 32
reticulatus, 32
stanfordii, 32
variabilis, 31
Simyothrips, 13
Siphonothrips, 24
Stenothrips, 13
Stenurothrips, 9
Stomatothrips, 8, 25
flavus, 25
Synaptothrips, 14

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